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Internal Medicine · Nephrology · Patient GuideInternal Medicine · Nefrolohiya · Gabay para sa PasyenteInternal Medicine · Nefrolohiya · Giya alang sa Pasyente

Anemia in Kidney Disease: Iron, EPO & EnergyAnemia sa Sakit sa Bato: Iron, EPO at LakasAnemia sa Sakit sa Kidney: Iron, EPO ug Kusog

The Right Iron. The Right Signal. A Better Quality of Life.Ang Tamang Iron. Ang Tamang Senyales. Mas Magandang Kalidad ng Buhay.Ang Husto nga Iron. Ang Husto nga Senyales. Mas Maayong Kalidad sa Kinabuhi.

Why anemia develops, how to identify its cause, and the targeted treatments — iron, erythropoietin, and nutrition — that restore energy and protect your heart and kidneys.Bakit nagkakaroon ng anemia, paano matukoy ang sanhi nito, at ang mga naka-target na paggamot — iron, erythropoietin, at nutrisyon — na nagpapanumbalik ng lakas at nagpoprotekta sa inyong puso at mga bato.Ngano naghinabo ang anemia, unsaon pagtino sa sanhi niini, ug ang mga naka-target nga pagtambal — iron, erythropoietin, ug nutrisyon — nga nagpanumbalik sa kusog ug nagprotekta sa inyong puso ug mga kidney.

AuthorMay-akdaAwtor: W. G. M. Rivero, MD, FPCP, DPSN Specialty: Internal Medicine · Nephrology · Nutrition Last ReviewedHuling Na-reviewKatapusang Na-reviewKarinan Na-review:

What Is Anemia — and Why Does It Matter?Ano ang Anemia — at Bakit Ito Mahalaga?Unsa ang Anemia — ug Nganong Importante Kini?

Anemia in Chronic Kidney Disease infographic: why it happens (EPO deficiency), common symptoms, how it is diagnosed, treatment options (iron, ESA medications), iron-rich foods, tips to help, and when to seek help.
Overview: Anemia in CKD — causes, symptoms, diagnosis, and treatment options.Pangkalahatang-ideya: Anemia sa CKD — mga sanhi, sintomas, diagnosis, at mga opsyon sa paggamot.Kinatibuk-an: Anemia sa CKD — mga hinungdan, sintomas, diagnosis, ug mga kapilian sa pagtambal.

Anemia means your blood does not carry enough oxygen to meet your body's needs. Red blood cells contain hemoglobin — the protein that picks up oxygen in the lungs and delivers it to every organ. When hemoglobin falls too low, every organ suffers — especially the heart (which works harder) and the kidneys (which need oxygen to maintain filtration).Ang anemia ay nangangahulugang ang inyong dugo ay hindi nagdadala ng sapat na oxygen para matugunan ang pangangailangan ng katawan. Ang mga pulang selula ng dugo ay naglalaman ng hemoglobin — ang protina na kumukuha ng oxygen sa baga at naghahatid nito sa bawat organo. Kapag masyadong bumaba ang hemoglobin, nagdurusa ang bawat organo — lalo na ang puso (na nagtatrabaho nang mas malakas) at ang mga bato (na nangangailangan ng oxygen upang mapanatili ang pagsasala).Ang anemia nagpasabot nga ang inyong dugo dili magdala og igo nga oxygen aron matubag ang mga pangangailangan sa lawas. Ang mga pulang selula sa dugo adunay hemoglobin — ang protina nga mokuha og oxygen sa baga ug maghatod niini sa matag organo. Kon mubaba kaayo ang hemoglobin, mag-antos ang matag organo — ilabi na ang kasingkasing (nga nagbuhat og mas kusog) ug ang mga kidney (nga nanginahanglan og oxygen aron mapadayon ang pagsala).

Anemia is defined as hemoglobin below 130 g/L in men and below 120 g/L in women. In CKD patients, the KDIGO 2024 target is 100–115 g/L — a range that balances oxygen delivery with the risk of excess hemoglobin causing hypertension and thrombosis.Ang anemia ay tinukoy bilang hemoglobin na mas mababa sa 130 g/L sa mga lalaki at mas mababa sa 120 g/L sa mga babae. Sa mga pasyenteng may CKD, ang target ng KDIGO 2024 ay 100–115 g/L — isang saklaw na nagbabalanse ng paghahatid ng oxygen sa panganib ng labis na hemoglobin na nagdudulot ng hypertension at thrombosis.Ang anemia gihulagway ingon nga hemoglobin nga ubos sa 130 g/L sa mga lalaki ug ubos sa 120 g/L sa mga babaye. Sa mga pasyente nga may CKD, ang target sa KDIGO 2024 mao ang 100–115 g/L — usa ka saklaw nga nagbalansi sa paghatod sa oxygen ug sa peligro sa sobrang hemoglobin nga hinungdan sa hypertension ug thrombosis.

Why CKD causes anemia — four mechanisms: EPO deficiency, hepcidin-mediated iron restriction, uremic toxin-shortened RBC lifespan, and PTH-driven marrow fibrosis

CKD anemia is multifactorial — EPO deficiency, iron-restricted erythropoiesis, and shortened RBC survival all contribute simultaneously. All three must be addressed.Ang anemia sa CKD ay may maraming dahilan — ang kakulangan ng EPO, ang iron-restricted erythropoiesis, at ang pinaikling buhay ng RBC ay sabay-sabay na nag-aambag. Ang lahat ng tatlo ay dapat tugunan.Ang anemia sa CKD adunay daghang hinungdan — ang kakulang sa EPO, ang iron-restricted erythropoiesis, ug ang gipamubo nga kinabuhi sa RBC nagambibit tanan sa dungan. Ang tanan nga tulo kinahanglan nga sulbaron.

Symptoms of anemiaMga sintomas ng anemiaMga sintomas sa anemia

Persistent fatigue and weakness even with rest, shortness of breath on mild exertion, palpitations or rapid heartbeat, pale skin, pale inner eyelids (conjunctival pallor), dizziness or light-headedness on standing, difficulty concentrating, cold intolerance, and reduced exercise capacity.Patuloy na pagod at kahinaan kahit may pahinga, igsi ng hininga sa magaang na pagsisikap, palpitasyon o mabilis na tibok ng puso, maputlang balat, maputlang panloob na talukap ng mata (conjunctival pallor), pagkahilo o pag-alinlangan sa pagtayo, kahirapan sa konsentrasyon, hindi pagtitiis sa lamig, at nabawasang kakayahan sa ehersisyo.Padayon nga pagkaluya ug kahuyang bisan may pahinga, kahapdos sa paghinga sa magaan nga paningkamot, palpitasyon o paspas nga tibok sa kasingkasing, mapulaw nga panit, mapulaw nga sulod sa talukap sa mata (conjunctival pallor), pagkahilo o pag-alingawngaw sa pagtindog, kalisod sa konsentrasyon, dili pagpas-an sa kabugnaw, ug nabuwang nga kakayahan sa ehersisyo.

Why anemia is dangerous in CKDBakit mapanganib ang anemia sa CKDNganong delikado ang anemia sa CKD

The heart compensates for anemia by beating faster and pumping more blood — chronic compensation causes left ventricular hypertrophy and eventual heart failure. In dialysis patients, anemia is independently associated with increased cardiovascular mortality, hospitalizations, and reduced quality of life.Ang puso ay nagbabayad para sa anemia sa pamamagitan ng mas mabilis na pagtibok at pagpump ng mas maraming dugo — ang patuloy na pagbabayad ay nagdudulot ng left ventricular hypertrophy at kalaunan ay pagpalya ng puso. Sa mga pasyenteng nasa dialysis, ang anemia ay independyenteng nauugnay sa pagtaas ng cardiovascular mortality, mga hospitalisasyon, at nabawasang kalidad ng buhay.Ang kasingkasing nagbayad alang sa anemia pinaagi sa mas paspas nga pagtibok ug pagpump sa mas daghang dugo — ang kronikong pagbayad nagdala sa left ventricular hypertrophy ug sa katapusan ay pagpaluya sa kasingkasing. Sa mga pasyente nga nag-dialysis, ang anemia adunay independyenteng kalabotan sa dugang cardiovascular mortality, mga hospitalisasyon, ug nabuwang nga kalidad sa kinabuhi.

Common Causes of AnemiaMga Karaniwang Sanhi ng AnemiaMga Kasagarang Hinungdan sa Anemia

Common Causes of Anemia — iron deficiency, CKD EPO deficiency, B12 folate deficiency, anemia of chronic disease, thalassemia, medication-related
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Iron deficiencyKakulangan ng ironKakulang sa iron

Most common cause globally. Blood loss (menstruation, GI bleeding), poor dietary intake, or poor absorption (gastritis, celiac).Pinaka-karaniwang sanhi sa buong mundo. Pagkawala ng dugo (regla, GI bleeding), mahinang pagkain, o mahinang pagsipsip (gastritis, celiac).Labing kasagarang hinungdan sa tibuok kalibutan. Pagkawala sa dugo (regla, GI bleeding), gamay nga pagkaon, o gamay nga pagsuyop (gastritis, celiac).

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CKD / EPO deficiencyCKD / Kakulangan ng EPOCKD / Kakulang sa EPO

Failing kidneys produce insufficient erythropoietin — the hormone that signals bone marrow to make red blood cells.Ang mga bagsak na bato ay gumagawa ng kulang na erythropoietin — ang hormon na nagbibigay-senyal sa bone marrow na gumawa ng mga pulang selula ng dugo.Ang mga napakyas nga kidney nagpatunghag kulang nga erythropoietin — ang hormon nga nag-signal sa bone marrow nga maghimo og mga pulang selula sa dugo.

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B12 / Folate deficiencyKakulangan ng B12 / FolateKakulang sa B12 / Folate

Required for DNA synthesis in red cell precursors. Deficiency causes large, immature cells (megaloblastic anemia).Kinakailangan para sa DNA synthesis sa mga precursor ng pulang selula. Ang kakulangan ay nagdudulot ng malalaki, hindi pa ganap na mga selula (megaloblastic anemia).Gikinahanglan alang sa DNA synthesis sa mga precursor sa pulang selula. Ang kakulang nagdala sa dagko, hilaw pa nga mga selula (megaloblastic anemia).

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Anemia of chronic diseaseAnemia ng kronikong sakitAnemia sa kroniko nga sakit

Inflammation from chronic illness (infection, autoimmune, cancer) sequesters iron and suppresses erythropoiesis via hepcidin.Ang pamamaga mula sa kronikong sakit (impeksyon, autoimmune, kanser) ay nagtatago ng iron at pumipigil sa erythropoiesis sa pamamagitan ng hepcidin.Ang pamamaga gikan sa kroniko nga sakit (impeksyon, autoimmune, kanser) nagtago sa iron ug nagpugong sa erythropoiesis pinaagi sa hepcidin.

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ThalassemiaThalassemiaThalassemia

Genetic disorder causing defective hemoglobin production. Common in Southeast Asia including the Philippines. Causes microcytic, hypochromic anemia resistant to iron therapy.Genetic disorder na nagdudulot ng depektibong produksyon ng hemoglobin. Karaniwan sa Timog-silangang Asya kasama ang Pilipinas. Nagdudulot ng microcytic, hypochromic anemia na lumalaban sa iron therapy.Genetic disorder nga nagdala sa depektibong produksyon sa hemoglobin. Kasagarang makita sa Timog-sidlakang Asya lakip ang Pilipinas. Nagdala sa microcytic, hypochromic anemia nga nagbatok sa iron therapy.

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Medication-relatedKaugnay sa gamotMay kalabotan sa tambal

ACE inhibitors, ARBs, immunosuppressants, and certain antibiotics can suppress red cell production or cause hemolysis.Ang ACE inhibitors, ARBs, immunosuppressants, at ilang antibiotics ay maaaring pigilan ang produksyon ng pulang selula o magdulot ng hemolysis.Ang ACE inhibitors, ARBs, immunosuppressants, ug pipila ka antibiotics mahimong pugngan ang produksyon sa pulang selula o makapahimong hemolysis.

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Most CKD anemia is multifactorialAng karamihang anemia sa CKD ay may maraming dahilanAng kadaghanan sa anemia sa CKD adunay daghang hinungdan

In a CKD or dialysis patient, anemia is rarely from a single cause. The most common combination is EPO deficiency + iron deficiency + chronic inflammation — all three must be addressed simultaneously. Treating EPO deficiency alone without ensuring iron adequacy is a common cause of ESA therapy failure.Sa isang pasyenteng may CKD o nasa dialysis, ang anemia ay bihirang manggaling sa isang dahilan lamang. Ang pinakakaraniwang kombinasyon ay kakulangan ng EPO + kakulangan ng iron + kronikong pamamaga — ang lahat ng tatlo ay dapat tugunan nang sabay-sabay. Ang paggamot lamang sa kakulangan ng EPO nang hindi tinitiyak ang sapat na iron ay isang karaniwang sanhi ng pagkabigo ng ESA therapy.Sa usa ka pasyente nga may CKD o nag-dialysis, ang anemia panagsa ra gikan sa usa ka hinungdan lamang. Ang labing kasagarang kombinasyon mao ang kakulang sa EPO + kakulang sa iron + kroniko nga pamamaga — ang tanan nga tulo kinahanglan nga sulbaron sa dungan. Ang pagtambal lamang sa kakulang sa EPO nga wala masiguro ang sapat nga iron usa ka kasagarang hinungdan sa pagkapakyas sa ESA therapy.

Why CKD Causes Anemia — The MechanismBakit Nagdudulot ng Anemia ang CKD — Ang MekanismoNganong Nagdala og Anemia ang CKD — Ang Mekanismo

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Erythropoietin (EPO) deficiency — the primary driverKakulangan ng Erythropoietin (EPO) — ang pangunahing dahilanKakulang sa Erythropoietin (EPO) — ang panguna nga hinungdan

The peritubular cells of the kidney sense oxygen tension and produce erythropoietin in response to hypoxia. As kidney tissue is lost in CKD, EPO production falls proportionally. Without EPO, the bone marrow receives no signal to produce new red blood cells — existing cells age and die without replacement, causing progressive anemia.Ang mga peritubular cell ng bato ay nakakakita ng oxygen tension at gumagawa ng erythropoietin bilang tugon sa hypoxia. Habang nawawala ang tissue ng bato sa CKD, ang produksyon ng EPO ay bumababa nang proporsyonal. Nang wala ang EPO, ang bone marrow ay walang natatanggap na senyal para gumawa ng bagong mga pulang selula ng dugo — ang mga kasalukuyang selula ay tumatanda at namamatay nang walang kapalit, na nagdudulot ng progresibong anemia.Ang mga peritubular cell sa kidney nakabati sa oxygen tension ug nagpatunghag erythropoietin isip tubag sa hypoxia. Samtang mawala ang tissue sa kidney sa CKD, ang produksyon sa EPO nag-ubos sa proporsyon. Kung wala ang EPO, ang bone marrow walay madawat nga signal aron maghimo og bag-ong mga pulang selula sa dugo — ang mga naanaa nga selula nag-edad ug namatay nga walay kapuli, nagdala sa progresibong anemia.

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Iron deficiency — absolute and functionalKakulangan ng iron — ganap at functionalKakulang sa iron — absoluto ug functional

CKD patients lose iron through the dialysis circuit (blood remaining in tubing), frequent blood draws, and GI bleeding from uremic platelet dysfunction. Additionally, inflammation raises hepcidin — a hormone that blocks iron release from stores even when ferritin appears adequate. This "iron-restricted erythropoiesis" requires IV iron, not oral iron.Ang mga pasyenteng may CKD ay nawawalan ng iron sa pamamagitan ng dialysis circuit (dugo na nananatili sa tubing), madalas na pagkuha ng dugo, at GI bleeding mula sa uremic platelet dysfunction. Bukod dito, ang pamamaga ay nagpapataas ng hepcidin — isang hormon na humahadlang sa pagpapalabas ng iron mula sa mga imbakan kahit na tila sapat ang ferritin. Ang "iron-restricted erythropoiesis" na ito ay nangangailangan ng IV iron, hindi oral iron.Ang mga pasyente nga may CKD nawad-an og iron pinaagi sa dialysis circuit (dugo nga nagpabilin sa tubing), kanunay nga pagkuha sa dugo, ug GI bleeding gikan sa uremic platelet dysfunction. Dugang pa, ang pamamaga nagpataas sa hepcidin — usa ka hormon nga nagpugong sa pagpagawas sa iron gikan sa mga imbakan bisan kung tila sapat ang ferritin. Kining "iron-restricted erythropoiesis" nanginahanglan og IV iron, dili oral iron.

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Shortened red blood cell survivalPinaikling buhay ng pulang selula ng dugoGipamubo nga kinabuhi sa pulang selula sa dugo

Uremic toxins damage red blood cell membranes, shortening their lifespan from the normal 120 days to as little as 60–90 days. Even with adequate EPO and iron, the bone marrow cannot produce cells fast enough to replace those being destroyed — worsening the anemia.Ang mga uremic toxin ay nagpapasama ng mga lamad ng pulang selula ng dugo, pinaikli ang kanilang buhay mula sa normal na 120 araw hanggang 60–90 araw lamang. Kahit may sapat na EPO at iron, ang bone marrow ay hindi makapaggawa ng mga selula nang mabilis upang mapalitan ang mga nasisira — nagpapalubha ng anemia.Ang mga uremic toxin nagdaot sa mga lamad sa pulang selula sa dugo, gipamubo ang ilang kinabuhi gikan sa normal nga 120 ka adlaw ngadto sa 60–90 ka adlaw lamang. Bisan may igo nga EPO ug iron, ang bone marrow dili makahimo og mga selula nga paspas aron mapuli ang mga ginadaot — nagpagrabe sa anemia.

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Secondary hyperparathyroidism — bone marrow fibrosisSecondary hyperparathyroidism — fibrosis ng bone marrowSecondary hyperparathyroidism — fibrosis sa bone marrow

Severely elevated PTH causes marrow fibrosis (osteitis fibrosa cystica) — replacing the normal marrow where red cells are made with fibrous tissue. This form of anemia responds poorly to EPO and iron — it requires control of PTH through active vitamin D, phosphate binders, and sometimes parathyroidectomy.Ang matinding pagtaas ng PTH ay nagdudulot ng marrow fibrosis (osteitis fibrosa cystica) — pinapalitan ang normal na marrow kung saan ginagawa ang mga pulang selula ng fibrous tissue. Ang anyang ito ay mahinang tumutugon sa EPO at iron — nangangailangan ito ng kontrol sa PTH sa pamamagitan ng active vitamin D, phosphate binders, at minsan parathyroidectomy.Ang grabeng pagtaas sa PTH nagdala sa marrow fibrosis (osteitis fibrosa cystica) — nagpuli sa normal nga marrow diin gihimo ang mga pulang selula pinaagi sa fibrous tissue. Kining matang sa anemia mahinay motubag sa EPO ug iron — nanginahanglan kini og kontrol sa PTH pinaagi sa active vitamin D, phosphate binders, ug usahay parathyroidectomy.

Diagnosing and Classifying AnemiaPag-diagnose at Pag-uuri ng AnemiaPag-diagnose ug Pag-klase sa Anemia

Diagnosing and Classifying Anemia in CKD — MCV categories, iron studies, ferritin targets, TSAT thresholds
TestPagsusuriPagsusihaWhat it identifiesAno ang natutukoy nitoUnsa ang natino niiniKey values to noteMahahalagang halaga na dapat tandaanMga importanteng kantidad nga hinumdoman
Hemoglobin (Hgb)Hemoglobin (Hgb)Hemoglobin (Hgb)Severity of anemiaKalubhaan ng anemiaGrabe nga anemiaCKD target 100–115 g/L. <80 = severe anemia requiring urgent evaluation.Target sa CKD 100–115 g/L. <80 = malubhang anemia na nangangailangan ng agarang pagsusuri.Target sa CKD 100–115 g/L. <80 = grabeng anemia nga nanginahanglan og dinalian nga pagsusiha.
MCV (Mean Cell Volume)MCV (Mean Cell Volume)MCV (Mean Cell Volume)Type of anemia by cell sizeUri ng anemia ayon sa laki ng selulaMatang sa anemia sumala sa gidak-on sa selula<80 fL = microcytic (iron deficiency, thalassemia); >100 fL = macrocytic (B12/folate deficiency); 80–100 = normocytic (CKD, chronic disease, mixed)<80 fL = microcytic (kakulangan ng iron, thalassemia); >100 fL = macrocytic (kakulangan ng B12/folate); 80–100 = normocytic (CKD, kronikong sakit, halo-halo)<80 fL = microcytic (kakulang sa iron, thalassemia); >100 fL = macrocytic (kakulang sa B12/folate); 80–100 = normocytic (CKD, kroniko nga sakit, halo-halo)
Serum ferritinSerum ferritinSerum ferritinIron storesImbakan ng ironImbakan sa ironCKD/dialysis target >200 ng/mL. <100 = definite iron deficiency. 100–200 = borderline; check TSAT.Target sa CKD/dialysis >200 ng/mL. <100 = tiyak na kakulangan ng iron. 100–200 = borderline; suriin ang TSAT.Target sa CKD/dialysis >200 ng/mL. <100 = siguradong kakulang sa iron. 100–200 = borderline; susihon ang TSAT.
TSAT (Transferrin Saturation)TSAT (Transferrin Saturation)TSAT (Transferrin Saturation)Functional iron availability for erythropoiesisFunctional na availability ng iron para sa erythropoiesisFunctional nga availability sa iron alang sa erythropoiesisCKD target >30%. <20% = iron-restricted erythropoiesis — IV iron indicated even if ferritin is "normal".Target sa CKD >30%. <20% = iron-restricted erythropoiesis — IV iron ay ipinahiwatig kahit "normal" ang ferritin.Target sa CKD >30%. <20% = iron-restricted erythropoiesis — IV iron gipaila bisan "normal" ang ferritin.
Reticulocyte count + CHrReticulocyte count + CHrReticulocyte count + CHrBone marrow response; iron adequacy for erythropoiesisTugon ng bone marrow; kasapatan ng iron para sa erythropoiesisTubag sa bone marrow; kasiguroan sa iron alang sa erythropoiesisLow reticulocytes = insufficient production. CHr (reticulocyte hemoglobin content) <29 pg = iron-restricted erythropoiesis.Mababang reticulocytes = kulang na produksyon. CHr (reticulocyte hemoglobin content) <29 pg = iron-restricted erythropoiesis.Ubos nga reticulocytes = kulang nga produksyon. CHr (reticulocyte hemoglobin content) <29 pg = iron-restricted erythropoiesis.
Serum B12 and folateSerum B12 at folateSerum B12 ug folateMacrocytic/megaloblastic anemiaMacrocytic/megaloblastic anemiaMacrocytic/megaloblastic anemiaB12 <200 pg/mL = deficiency. Low folate with megaloblastic picture requires oral folic acid 1–5 mg daily.B12 <200 pg/mL = kakulangan. Mababang folate na may megaloblastic na larawan ay nangangailangan ng oral folic acid 1–5 mg araw-araw.B12 <200 pg/mL = kakulang. Ubos nga folate nga adunay megaloblastic nga hulagway nanginahanglan og oral folic acid 1–5 mg matag adlaw.
Hemoglobin electrophoresisHemoglobin electrophoresisHemoglobin electrophoresisThalassemia and hemoglobin variantsThalassemia at mga variant ng hemoglobinThalassemia ug mga variant sa hemoglobinEssential when microcytic anemia does not respond to iron therapy. Common in Filipino patients — alpha and beta thalassemia trait are prevalent.Mahalaga kapag ang microcytic anemia ay hindi tumutugon sa iron therapy. Karaniwan sa mga pasyenteng Pilipino — ang alpha at beta thalassemia trait ay laganap.Hinungdanon kon ang microcytic anemia dili motubag sa iron therapy. Kasagarang makita sa mga pasyenteng Pilipino — ang alpha ug beta thalassemia trait kaylap.
CRP / hsCRPCRP / hsCRPCRP / hsCRPInflammation — suppresses iron utilizationPamamaga — pinipigilan ang paggamit ng ironPamamaga — nagpugong sa paggamit sa ironElevated CRP + low TSAT + high ferritin = anemia of chronic disease / iron-restricted erythropoiesis. IV iron + treat underlying inflammation.Mataas na CRP + mababang TSAT + mataas na ferritin = anemia ng kronikong sakit / iron-restricted erythropoiesis. IV iron + gamutin ang pinagbabatayan na pamamaga.Taas nga CRP + ubos nga TSAT + taas nga ferritin = anemia sa kroniko nga sakit / iron-restricted erythropoiesis. IV iron + tambalon ang nagpapailalom nga pamamaga.

Iron Supplementation — Oral vs IntravenousPagdadagdag ng Iron — Oral kumpara sa IntravenousPagdugang sa Iron — Oral batok sa Intravenous

Iron Supplementation in CKD — Oral vs Intravenous: oral formulations (ferrous sulfate, sucrosomial Sideral, liposomal Pelamis) for Stage 1–3, IV iron sucrose for Stage 3b–5 and dialysis, hepcidin pathway

Oral iron — overviewOral iron — pangkalahatang-ideyaOral iron — kinatibuk-an

Oral iron remains the first-line choice for pre-dialysis CKD Stage 1–3 with mild-to-moderate iron deficiency. Absorption is limited in CKD (hepcidin elevation, reduced gastric acid) — typically only 10–15% of the elemental iron dose is absorbed, compared to 25–35% in healthy individuals. Multiple formulations are now available in the Philippines with different elemental iron content, tolerability profiles, and mechanisms of absorption. See comparison table below.Ang oral iron ay nananatiling pangunahing pagpipilian para sa pre-dialysis CKD Stage 1–3 na may banayad hanggang katamtamang kakulangan ng iron. Ang pagsipsip ay limitado sa CKD (pagtaas ng hepcidin, nabawasang gastric acid) — karaniwang 10–15% lamang ng elemental iron dose ang nasipsip, kumpara sa 25–35% sa mga malusog na tao. Maraming formulation ang available na sa Pilipinas na may iba't ibang nilalaman ng elemental iron, profile ng tolerability, at mekanismo ng pagsipsip. Tingnan ang talahanayan ng paghahambing sa ibaba.Ang oral iron nagpabilin nga pangunahing kapilian alang sa pre-dialysis CKD Stage 1–3 nga adunay banayad hangtod katamtamang kakulang sa iron. Ang pagsuyop limitado sa CKD (pagtaas sa hepcidin, nabuwang gastric acid) — kasagarang 10–15% lamang sa elemental iron dose ang nasuyop, kumpara sa 25–35% sa mga malusog nga tawo. Daghang formulation ang available na sa Pilipinas nga adunay lain-laing sulod sa elemental iron, profile sa tolerability, ug mekanismo sa pagsuyop. Tan-awa ang talahanayan sa pagtandi sa ubos.

IV iron — preferred in CKD Stage 3b–5 and dialysisIV iron — mas mainam sa CKD Stage 3b–5 at dialysisIV iron — mas gipili sa CKD Stage 3b–5 ug dialysis

IV iron sucrose is the standard in Philippine dialysis centers, available locally as Ferrofer, Anema, and Ferriscript (all iron sucrose 100 mg/5 mL ampoules — available at Philippine dialysis centers). All are iron sucrose complex formulations and are clinically equivalent for standard dosing. IV iron bypasses absorption barriers, delivers iron directly to storage and bone marrow, and is significantly more effective than oral iron in CKD Stage 3–5 and dialysis. Standard dosing: loading 200 mg IV × 3 sessions (over 1–2 weeks); maintenance 100 mg per HD session once iron targets are reached. Infuse slowly over 15–30 minutes diluted in 100 mL normal saline. Monitor for hypersensitivity reactions — observe patient for 30 minutes post-infusion. Do not administer if ferritin >500 ng/mL with active infection or inflammation.Ang IV iron sucrose ang pamantayan sa mga dialysis center sa Pilipinas, available nang lokal bilang Ferrofer, Anema, at Ferriscript (lahat ay iron sucrose 100 mg/5 mL ampoule). Lahat ay naglalaman ng iron sucrose complex at clinically equivalent para sa karaniwang dosis. Ang IV iron ay lumalampas sa mga hadlang sa pagsipsip, naghahatid ng iron nang direkta sa imbakan at bone marrow, at mas epektibo kaysa oral iron sa CKD Stage 3–5 at dialysis. Karaniwang dosis: loading 200 mg IV × 3 sessions (sa loob ng 1–2 linggo); maintenance 100 mg bawat HD session kapag naabot na ang mga target ng iron. Mag-infuse nang dahan-dahan sa loob ng 15–30 minuto na natunaw sa 100 mL normal saline. Bantayan ang mga reaksyon ng hypersensitivity — obserbahan ang pasyente sa loob ng 30 minuto pagkatapos ng infusion. Huwag ibigay kung ang ferritin >500 ng/mL na may aktibong impeksyon o pamamaga.Ang IV iron sucrose mao ang pamantayan sa mga dialysis center sa Pilipinas, available nang lokal isip Ferrofer, Anema, ug Ferriscript (tanan iron sucrose 100 mg/5 mL ampoule). Tanan adunay iron sucrose complex ug clinically equivalent alang sa standard nga dosis. Ang IV iron milabang sa mga babag sa pagsuyop, naghatod sa iron direkta sa imbakan ug bone marrow, ug labi ka epektibo kaysa oral iron sa CKD Stage 3–5 ug dialysis. Kasagarang dosis: loading 200 mg IV × 3 sessions (sulod sa 1–2 ka semana); maintenance 100 mg sa matag HD session kon naabot na ang mga target sa iron. Mag-infuse nga hinay sulod sa 15–30 minuto nga natunaw sa 100 mL normal saline. Bantayan ang mga reaksyon sa hypersensitivity — obserbahan ang pasyente sulod sa 30 minuto human sa infusion. Ayaw ihatag kon ang ferritin >500 ng/mL nga adunay aktibong impeksyon o pamamaga.

Oral Iron Formulations — New vs. ConventionalMga Formulation ng Oral Iron — Bago kumpara sa TradisyonalMga Formulation sa Oral Iron — Bag-o batok sa Tradisyonal

Not all oral iron supplements are equal. Conventional ferrous sulfate is inexpensive but poorly tolerated and poorly absorbed in CKD. Newer formulations — sucrosomial iron (Sideral) and liposomal/ferric pyrophosphate (Pelamis) — offer higher bioavailability, significantly fewer GI side effects, and novel absorption pathways that partially bypass hepcidin blockade.Hindi lahat ng oral iron supplement ay pantay. Ang conventional ferrous sulfate ay mura ngunit mahirap tiisin at mahirap masipsip sa CKD. Ang mga bagong formulation — sucrosomial iron (Sideral) at liposomal/ferric pyrophosphate (Pelamis) — ay nag-aalok ng mas mataas na bioavailability, mas kaunting GI side effects, at mga bagong landas ng pagsipsip na bahagyang lumalampas sa hepcidin blockade.Dili tanan nga oral iron supplement managsama. Ang conventional ferrous sulfate barato apan lisod tiiron ug lisod masuyop sa CKD. Ang mga bag-ong formulation — sucrosomial iron (Sideral) ug liposomal/ferric pyrophosphate (Pelamis) — nagtanyag og mas taas nga bioavailability, labi ka gamay nga GI side effects, ug mga bag-ong dalan sa pagsuyop nga bahin nga milabang sa hepcidin blockade.

FormulationFormulationFormulation Brand (PH)Brand (PH)Brand (PH) Elemental FeElemental FeElemental Fe Absorption mechanismMekanismo ng pagsipsipMekanismo sa pagsuyop GI tolerabilityGI tolerabilityGI tolerability CKD rolePapel sa CKDPapel sa CKD
Ferrous sulfate (FeSO₄) Feosol, Ferobin, generics 65 mg per 325 mg tab DMT-1 transporter (duodenum). Requires acidic gastric environment. Blocked by hepcidin and inflammation.DMT-1 transporter (duodenum). Nangangailangan ng maasim na kapaligiran sa tiyan. Hinahadlangan ng hepcidin at pamamaga.DMT-1 transporter (duodenum). Nanginahanglan og acidic nga kapaligiran sa tiyan. Gipugngan sa hepcidin ug pamamaga. PoorMahirapDili maayoconstipation, nausea, black stools common. GI side effects lead to non-adherence in ~30–40%.constipation, pagduduwal, itim na dumi ay karaniwan. Ang GI side effects ay nagdudulot ng hindi pagsunod sa ~30–40%.constipation, pagduwal, itom nga tae kasagarang mahitabo. Ang GI side effects nagdala sa dili pagsunod sa ~30–40%. First-line in Stage 1–3 mild deficiency. Limited utility in Stage 3b–5 due to absorption barriers. Inexpensive.Pangunahing pagpipilian sa Stage 1–3 na banayad na kakulangan. Limitadong silbi sa Stage 3b–5 dahil sa mga hadlang sa pagsipsip. Mura.Pangunahing kapilian sa Stage 1–3 banayad nga kakulang. Limitado ang gamit sa Stage 3b–5 tungod sa mga babag sa pagsuyop. Barato.
Ferrous gluconate / fumarate Fergon, Ferro-folic generics 36 mg (gluconate) / 33 mg (fumarate) per tab Same DMT-1 pathway as FeSO₄. Lower elemental iron per dose than sulfate.Parehong DMT-1 pathway gaya ng FeSO₄. Mas mababang elemental iron bawat dosis kaysa sulfate.Pareho nga DMT-1 pathway sama sa FeSO₄. Mas ubos nga elemental iron sa matag dosis kaysa sulfate. ModerateKatamtamanKatamtamanslightly better tolerated than sulfate due to lower elemental iron per dose.bahagyang mas madaling tiisin kaysa sulfate dahil sa mas mababang elemental iron bawat dosis.gamay nga mas sayon tiiron kaysa sulfate tungod sa mas ubos nga elemental iron sa matag dosis. Alternative to FeSO₄ when GI side effects are dose-limiting. Comparable efficacy.Alternatibo sa FeSO₄ kapag ang GI side effects ay dose-limiting. Katulad na bisa.Alternatibo sa FeSO₄ kon ang GI side effects dose-limiting. Katumbas nga epekto.
Sucrosomial iron
(ferric pyrophosphate encapsulated in phospholipid + sucrose ester matrix)
Sideral (Pharma Nord / local distributors)
30 mg elemental Fe capsule
30 mg per capsule Absorbed via both DMT-1 and a novel transcellular pathway through enterocytes — partially bypasses the hepcidin-DMT1 blockade seen in CKD. Does not require gastric acid activation.Nasisisip sa pamamagitan ng parehong DMT-1 at isang bagong transcellular pathway sa pamamagitan ng mga enterocyte — bahagyang lumalampas sa hepcidin-DMT1 blockade na nakikita sa CKD. Hindi nangangailangan ng gastric acid activation.Nasuyop pinaagi sa DMT-1 ug usa ka bag-ong transcellular pathway pinaagi sa mga enterocyte — bahin nga milabang sa hepcidin-DMT1 blockade nga makita sa CKD. Wala nagkinahanglan og gastric acid activation. GoodMabutiMaayophospholipid matrix protects GI mucosa. Significantly fewer side effects than FeSO₄. Can be taken with food.ang phospholipid matrix ay nagpoprotekta sa GI mucosa. Mas kaunting side effects kaysa FeSO₄. Maaaring inumin kasama ang pagkain.ang phospholipid matrix nagpanalipod sa GI mucosa. Labi ka gamay nga side effects kaysa FeSO₄. Mahimong inumon uban sa pagkaon. Emerging role in CKD Stage 2–4 where hepcidin-mediated absorption is impaired. RCTs show non-inferiority to IV iron in non-dialysis CKD for mild-moderate deficiency. Higher cost than FeSO₄.Lumalabas na papel sa CKD Stage 2–4 kung saan ang hepcidin-mediated absorption ay may kapansanan. Ang mga RCT ay nagpapakita ng non-inferiority sa IV iron sa non-dialysis CKD para sa banayad hanggang katamtamang kakulangan. Mas mataas na gastos kaysa FeSO₄.Nagtubo nga papel sa CKD Stage 2–4 diin ang hepcidin-mediated absorption may pagkamay-depekto. Ang mga RCT nagpakita og non-inferiority sa IV iron sa non-dialysis CKD alang sa banayad hangtod katamtamang kakulang. Mas taas nga gasto kaysa FeSO₄.
Ferric pyrophosphate citrate — oral / dialysate
(liposomal iron formulation)
Pelamis (oral sachets)
Note: Triferic (dialysate FPC) is a related but distinct IV formulation — not the same as oral Pelamis
Variable by sachet formulation — confirm on package insert Liposomal encapsulation delivers ferric iron directly to enterocyte membrane — absorbed via a non-DMT1 pathway. Highly resistant to hepcidin blockade. Stable at neutral pH — does not require gastric acid.Ang liposomal encapsulation ay naghahatid ng ferric iron nang direkta sa enterocyte membrane — nasisisip sa pamamagitan ng non-DMT1 pathway. Lubos na lumalaban sa hepcidin blockade. Matatag sa neutral pH — hindi nangangailangan ng gastric acid.Ang liposomal encapsulation naghatod sa ferric iron direkta sa enterocyte membrane — nasuyop pinaagi sa non-DMT1 pathway. Labi ka batok sa hepcidin blockade. Lig-on sa neutral pH — wala nagkinahanglan og gastric acid. ExcellentNapakahusayLabing maayominimal GI side effects due to liposomal protection. Can be taken at any time, with or without food.minimal na GI side effects dahil sa liposomal protection. Maaaring inumin anumang oras, may pagkain man o wala.minimal nga GI side effects tungod sa liposomal protection. Mahimong inumon bisan unsang oras, uban o walay pagkaon. Most promising oral formulation for CKD patients who cannot tolerate conventional iron or have significant hepcidin-mediated absorption failure. Local availability: verify current FDA-PH registration status before prescribing. Higher cost. Emerging evidence in CKD; Phase III data expected 2025–2026.Pinaka-promising na oral formulation para sa mga pasyenteng may CKD na hindi kayang tiisin ang conventional iron o may malaking hepcidin-mediated absorption failure. Lokal na availability: i-verify ang kasalukuyang FDA-PH registration status bago mag-reseta. Mas mataas na gastos. Lumalabas na ebidensya sa CKD; inaasahang Phase III data sa 2025–2026.Labing promising nga oral formulation alang sa mga pasyente nga may CKD nga dili makatiis sa conventional iron o adunay dakong hepcidin-mediated absorption failure. Lokal nga availability: i-verify ang kasamtangang FDA-PH registration status sa wala pa mag-reseta. Mas taas nga gasto. Nagtubo nga ebidensya sa CKD; gipaabut nga Phase III data sa 2025–2026.
Iron sucrose IV
(parenteral — reference standard)
Ferrofer, Anema, Ferriscript 100 mg / 5 mL ampoule (20 mg/mL) Direct IV delivery — 100% bioavailable. No GI absorption required. Bypasses all hepcidin-mediated barriers. Taken up by reticuloendothelial system and released to transferrin.Direktang IV delivery — 100% bioavailable. Hindi kailangan ng GI absorption. Lumalampas sa lahat ng hepcidin-mediated barriers. Kinukuha ng reticuloendothelial system at inilalabas sa transferrin.Direktang IV delivery — 100% bioavailable. Wala kinahanglana nga GI absorption. Milabang sa tanan nga hepcidin-mediated barriers. Gikuha sa reticuloendothelial system ug gipagawas sa transferrin. N/A (IV)No GI side effects. Hypersensitivity reaction risk (<1%); observe 30 min post-infusion.Walang GI side effects. Panganib ng hypersensitivity reaction (<1%); obserbahan ng 30 min pagkatapos ng infusion.Walay GI side effects. Peligro sa hypersensitivity reaction (<1%); obserbahan og 30 min human sa infusion. Gold standard for CKD Stage 3b–5 and all dialysis patients. Most effective at replenishing iron stores rapidly. Requires healthcare facility administration.Gold standard para sa CKD Stage 3b–5 at lahat ng pasyenteng nasa dialysis. Pinaka-epektibo sa mabilis na pagpapanumbalik ng mga imbakan ng iron. Nangangailangan ng pamamahala sa pasilidad ng pangangalagang pangkalusugan.Gold standard alang sa CKD Stage 3b–5 ug tanan nga pasyente nga nag-dialysis. Labing epektibo sa paspas nga pagpuno pag-usab sa mga imbakan sa iron. Nanginahanglan og administrasyon sa pasilidad sa pag-atiman sa kahimsog.
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Practical prescribing guidance — choosing the right oral iron in CKDPraktikal na gabay sa pag-reseta — pagpili ng tamang oral iron sa CKDPraktikal nga giya sa pag-reseta — pagpili sa husto nga oral iron sa CKD

  • CKD Stage 1–2, mild deficiency, no inflammation:CKD Stage 1–2, banayad na kakulangan, walang pamamaga:CKD Stage 1–2, banayad nga kakulang, walay pamamaga: Ferrous sulfate 325 mg OD–BID on empty stomach + calamansi juice. Inexpensive, effective if hepcidin not elevated.Ferrous sulfate 325 mg OD–BID sa walang laman na tiyan + katas ng calamansi. Mura, epektibo kung hindi mataas ang hepcidin.Ferrous sulfate 325 mg OD–BID sa walay sulod nga tiyan + katas sa calamansi. Barato, epektibo kon dili taas ang hepcidin.
  • CKD Stage 2–4, GI intolerance to FeSO₄ or suboptimal response:CKD Stage 2–4, hindi matiisin ang FeSO₄ sa GI o suboptimal na tugon:CKD Stage 2–4, dili matiiron ang FeSO₄ sa GI o suboptimal nga tubag: Sideral (sucrosomial iron) 1 cap OD–BID with food. Better tolerability, partially bypasses hepcidin, suitable for patients who cannot tolerate conventional iron.Sideral (sucrosomial iron) 1 cap OD–BID kasama ang pagkain. Mas madaling tiisin, bahagyang lumalampas sa hepcidin, angkop para sa mga pasyenteng hindi makakatiisin ng conventional iron.Sideral (sucrosomial iron) 1 cap OD–BID uban sa pagkaon. Mas sayon tiiron, bahin nga milabang sa hepcidin, angay alang sa mga pasyente nga dili makatiis sa conventional iron.
  • CKD Stage 3–4, significant hepcidin elevation, absorption failure:CKD Stage 3–4, makabuluhang pagtaas ng hepcidin, kabiguan sa pagsipsip:CKD Stage 3–4, dakong pagtaas sa hepcidin, pagkapakyas sa pagsuyop: Consider Pelamis (liposomal FPC) sachets — verify local FDA-PH availability before prescribing.Isaalang-alang ang Pelamis (liposomal FPC) sachets — i-verify ang lokal na FDA-PH availability bago mag-reseta.Konsiderahon ang Pelamis (liposomal FPC) sachets — i-verify ang lokal nga FDA-PH availability sa wala pa mag-reseta.
  • CKD Stage 3b–5 and all hemodialysis patients:CKD Stage 3b–5 at lahat ng pasyenteng nasa hemodialysis:CKD Stage 3b–5 ug tanan nga pasyente nga nag-hemodialysis: IV iron sucrose (Ferrofer, Anema, or Ferriscript) — oral iron is largely ineffective at this stage due to iron-restricted erythropoiesis from hepcidin. IV route is standard of care.IV iron sucrose (Ferrofer, Anema, o Ferriscript) — ang oral iron ay halos hindi epektibo sa yugtong ito dahil sa iron-restricted erythropoiesis mula sa hepcidin. Ang IV route ang pamantayan ng pag-aalaga.IV iron sucrose (Ferrofer, Anema, o Ferriscript) — ang oral iron halos dili epektibo sa yugto nga kini tungod sa iron-restricted erythropoiesis gikan sa hepcidin. Ang IV route mao ang pamantayan sa pag-atiman.
  • Never give IV iron during active bacterial infectionHuwag kailanman magbigay ng IV iron sa panahon ng aktibong impeksyon sa bakteryaAyaw gayud hatagi og IV iron sa panahon sa aktibong impeksyon sa bakteryasee alert below.tingnan ang alerto sa ibaba.tan-awa ang alerto sa ubos.
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Do not give IV iron during active infectionHuwag magbigay ng IV iron sa panahon ng aktibong impeksyonAyaw hatagi og IV iron sa panahon sa aktibong impeksyon

IV iron should be withheld during active bacterial infection — bacteria thrive on free iron, and IV iron administration during sepsis or bacteremia worsens outcomes. Withhold IV iron until the infection has been treated and resolved (typically at least 2–4 weeks after completing antibiotics and confirming culture negativity).Ang IV iron ay dapat pigilan sa panahon ng aktibong impeksyon sa bakterya — ang mga bakterya ay lumalaki sa libreng iron, at ang pagbibigay ng IV iron sa panahon ng sepsis o bacteremia ay nagpapalala ng mga resulta. Pigilan ang IV iron hanggang ang impeksyon ay nagamot at nalutas na (karaniwang hindi bababa sa 2–4 linggo pagkatapos makumpleto ang mga antibiotics at nakumpirma ang negatibong kultura).Ang IV iron kinahanglan nga pugngan sa panahon sa aktibong impeksyon sa bakterya — ang mga bakterya naglambo sa libre nga iron, ug ang paghatag sa IV iron sa panahon sa sepsis o bacteremia nagpagrabe sa mga resulta. Pugngan ang IV iron hangtod ang impeksyon natambal ug naayo na (kasagarang labing menos 2–4 ka semana human makompleto ang mga antibiotics ug nakumpirma ang negatibong kultura).

ESA Therapy — Replacing the Kidney's SignalESA Therapy — Pagpapalit sa Signal ng BatoESA Therapy — Pagpuli sa Signal sa Kidney

ESA Therapy for Anemia in CKD — EPO dosing, hemoglobin targets, hypertension risk, and when to escalate

When iron stores are adequate (ferritin >200, TSAT >30%) and hemoglobin remains below 100 g/L, erythropoiesis-stimulating agents (ESAs) are initiated to stimulate bone marrow red cell production.Kapag sapat na ang mga imbakan ng iron (ferritin >200, TSAT >30%) at ang hemoglobin ay nananatiling mas mababa sa 100 g/L, ang mga erythropoiesis-stimulating agent (ESA) ay sinimulan upang pukawin ang produksyon ng pulang selula sa bone marrow.Kon igo na ang mga imbakan sa iron (ferritin >200, TSAT >30%) ug ang hemoglobin nagpabilin nga ubos sa 100 g/L, ang mga erythropoiesis-stimulating agent (ESA) gisugdan aron pukawin ang produksyon sa pulang selula sa bone marrow.

1

Iron first — alwaysIron muna — palagiIron una — kanunay

ESA therapy without adequate iron stores is ineffective and wasteful. The bone marrow needs iron to build hemoglobin in every new red cell. Always ensure ferritin >200 and TSAT >30% before initiating or escalating ESA dose.Ang ESA therapy nang wala sapat na imbakan ng iron ay hindi epektibo at sayang. Ang bone marrow ay nangangailangan ng iron upang bumuo ng hemoglobin sa bawat bagong pulang selula. Palaging tiyaking ferritin >200 at TSAT >30% bago simulan o taasan ang dosis ng ESA.Ang ESA therapy nga walay igo nga imbakan sa iron dili epektibo ug sayang. Ang bone marrow nanginahanglan og iron aron magtukod og hemoglobin sa matag bag-ong pulang selula. Kanunay sigurohon nga ferritin >200 ug TSAT >30% sa wala pa magsugod o magtaas sa dosis sa ESA.

2

Starting dose and routePanimulang dosis at rutaSinugdanan nga dosis ug ruta

Epoietin alpha — available in the Philippines as Eprex (Janssen) and Eposino (Goodfellow) — is the standard first-line ESA. Dose: 4,000 IU subcutaneously 2–3 times per week (or IV during dialysis). Recormon (Roche) is epoietin beta — a distinct molecular form available in 2,000 IU, 5,000 IU, and 10,000 IU prefilled syringes — and is also used in the Philippines but is not epoietin alpha. Both alpha and beta forms stimulate the same EPO receptor and have comparable clinical efficacy at equivalent doses; however they are not interchangeable unit-for-unit — confirm the specific agent and dose with your nephrologist. Darbepoetin alfa has a longer half-life and can be given weekly or every 2 weeks at lower injection frequency. Start low and titrate — overshoot above 115 g/L increases cardiovascular risk and thrombosis.Epoietin alpha — available sa Pilipinas bilang Eprex (Janssen) at Eposino (Goodfellow) — ang pamantayang pangunahing ESA. Dosis: 4,000 IU subcutaneously 2–3 beses bawat linggo (o IV sa panahon ng dialysis). Ang Recormon (Roche) ay epoietin beta — isang natatanging molecular form na available sa 2,000 IU, 5,000 IU, at 10,000 IU prefilled syringe — at ginagamit din sa Pilipinas ngunit hindi epoietin alpha. Ang parehong alpha at beta form ay nagpapasigla ng parehong EPO receptor at may katulad na klinikal na bisa sa katumbas na dosis; gayunpaman hindi sila maaaring palitan nang unit-for-unit — kumpirmahin ang tiyak na agent at dosis sa inyong nephrologist. Ang darbepoetin alfa ay may mas matagal na half-life at maaaring ibigay lingguhan o bawat 2 linggo sa mas mababang dalas ng iniksyon. Magsimula nang mababa at mag-titrate — ang paglampas sa itaas ng 115 g/L ay nagpapataas ng cardiovascular risk at thrombosis.Epoietin alpha — available sa Pilipinas isip Eprex (Janssen) ug Eposino (Goodfellow) — ang pamantayang pangunahing ESA. Dosis: 4,000 IU subcutaneously 2–3 ka beses sa matag semana (o IV sa panahon sa dialysis). Ang Recormon (Roche) mao ang epoietin beta — usa ka lain nga molecular form nga available sa 2,000 IU, 5,000 IU, ug 10,000 IU prefilled syringe — ug gigamit usab sa Pilipinas apan dili epoietin alpha. Ang alpha ug beta form nagdasig sa pareho nga EPO receptor ug adunay katumbas nga klinikal nga epekto sa katumbas nga dosis; bisan pa dili sila mapuli sa unit-for-unit — kumpirmahon ang espesipikong agent ug dosis sa inyong nephrologist. Ang darbepoetin alfa adunay mas taas nga half-life ug mahimong ihatag matag semana o matag 2 ka semana sa mas ubos nga dalas sa iniksyon. Magsugod nga ubos ug mag-titrate — ang pagsabaw sa ibabaw sa 115 g/L nagpataas sa cardiovascular risk ug thrombosis.

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Hemoglobin monitoring and targetPagmamasid sa hemoglobin at targetPagbantay sa hemoglobin ug target

Check hemoglobin monthly. Target is 100–115 g/L — do NOT target higher. If hemoglobin rises above 115 g/L, reduce ESA dose. If hemoglobin rises above 130 g/L, hold ESA temporarily. Higher hemoglobin targets are associated with increased stroke and myocardial infarction risk (TREAT trial).Suriin ang hemoglobin bawat buwan. Ang target ay 100–115 g/L — HUWAG mag-target ng mas mataas. Kung ang hemoglobin ay umaangat nang higit sa 115 g/L, bawasan ang dosis ng ESA. Kung ang hemoglobin ay umaangat nang higit sa 130 g/L, pansamantalang ihinto ang ESA. Ang mas mataas na target ng hemoglobin ay nauugnay sa pagtaas ng panganib ng stroke at myocardial infarction (TREAT trial).Susihon ang hemoglobin matag buwan. Ang target mao ang 100–115 g/L — AYAW mag-target og mas taas. Kon ang hemoglobin mosaka ibabaw sa 115 g/L, bawason ang dosis sa ESA. Kon ang hemoglobin mosaka ibabaw sa 130 g/L, ihunong sa makadiyot ang ESA. Ang mas taas nga mga target sa hemoglobin adunay kalabotan sa dugang peligro sa stroke ug myocardial infarction (TREAT trial).

4

ESA resistance — investigate before escalating dosePaglaban sa ESA — imbestigahan bago taasan ang dosisPagsukol sa ESA — imbestigahon sa wala pa taason ang dosis

If hemoglobin does not rise after 4–8 weeks despite adequate ESA dosing, do not simply increase the dose. Investigate: is iron truly adequate? Is there occult bleeding? Active infection or inflammation? Vitamin B12/folate deficiency? Hyperparathyroidism with marrow fibrosis? Anti-EPO antibodies (rare)? Each cause requires specific treatment, not more ESA.Kung ang hemoglobin ay hindi tumataas pagkatapos ng 4–8 linggo kahit may sapat na dosis ng ESA, huwag basta-basta taasan ang dosis. Imbestigahan: talaga bang sapat ang iron? May nakatagong pagdurugo? Aktibong impeksyon o pamamaga? Kakulangan ng Vitamin B12/folate? Hyperparathyroidism na may marrow fibrosis? Anti-EPO antibodies (bihira)? Ang bawat sanhi ay nangangailangan ng tiyak na paggamot, hindi mas maraming ESA.Kon ang hemoglobin dili mosaka human sa 4–8 ka semana bisan adunay igo nga dosis sa ESA, ayaw lang taason ang dosis. Imbestigahon: tinuod bang igo ang iron? Aduna bay naghisgot nga pagdugo? Aktibong impeksyon o pamamaga? Kakulang sa Vitamin B12/folate? Hyperparathyroidism nga adunay marrow fibrosis? Anti-EPO antibodies (panagsa)? Ang matag hinungdan nanginahanglan og espesipikong pagtambal, dili dugang ESA.

Eating for Healthy Blood — Iron-Rich Filipino FoodsPagkain para sa Malusog na Dugo — Mga Pagkaing May Mataas na Iron sa PilipinasPagkaon alang sa Malusog nga Dugo — Mga Pagkaon nga Dato sa Iron sa Pilipinas

Eating for Healthy Blood — Iron-rich Filipino foods: malunggay, bangus, kangkong, mongo, lean meat; absorption blockers to avoid; calamansi vitamin C trick to boost absorption 2–4x

Iron-rich foods — eat regularlyMga pagkaing mayaman sa iron — kainin nang regularMga pagkaon nga dato sa iron — kaonon nga regular

  • Lean beef and pork — heme iron (best absorbed, 15–35%)Manipis na baka at baboy — heme iron (pinakamadaling masipsip, 15–35%)Payat nga baka ug baboy — heme iron (labing madaling masuyop, 15–35%)
  • Chicken and turkey dark meatMadilim na karne ng manok at paboItom nga unod sa manok ug pabo
  • Malunggay (moringa) leaves — high non-heme iron; local and affordableDahon ng malunggay (moringa) — mataas na non-heme iron; lokal at abot-kayaDahon sa malunggay (moringa) — taas nga non-heme iron; lokal ug barato
  • Mongo beans (mung beans) — plant-based ironMongo (mung beans) — iron mula sa halamanMongo (mung beans) — iron gikan sa tanum
  • Kangkong — moderate iron; boil to reduce potassium if neededKangkong — katamtamang iron; pakuluan upang mabawasan ang potassium kung kinakailanganKangkong — katamtamang iron; pabukalon aron mabawasan ang potassium kon kinahanglan
  • Fortified rice and cerealsFortified na bigas at cerealFortified nga bugas ug cereal
  • Egg yolks — moderate iron contentPula ng itlog — katamtamang nilalaman ng ironPula sa itlog — katamtamang sulod sa iron
  • Bangus (milkfish) and other fishBangus at iba pang isdaBangus ug uban pang isda

Reduce these — they block iron absorptionBawasan ito — humahadlang ang mga ito sa pagsipsip ng ironBawasan kini — nagpugong kini sa pagsuyop sa iron

  • Tea and coffee within 1 hour of iron-rich meals (tannins)Tsaa at kape sa loob ng 1 oras pagkatapos ng mga pagkaing mayaman sa iron (tannins)Tsaa ug kape sulod sa 1 ka oras human sa mga pagkaon nga dato sa iron (tannins)
  • Calcium-rich foods (dairy) taken at the same time as iron supplementsMga pagkaing mayaman sa calcium (gatas) na kinukuha nang sabay sa mga iron supplementMga pagkaon nga dato sa calcium (gatas) nga gikuha nga dungan sa mga iron supplement
  • Whole grain phytates when taken with iron supplementsMga phytate sa buong butil kapag kinuha kasama ang mga iron supplementMga phytate sa tibuok butil kon gikuha uban sa mga iron supplement
  • Antacids, phosphate binders taken simultaneously with oral ironMga antacid, phosphate binder na kinukuha nang sabay sa oral ironMga antacid, phosphate binder nga gikuha nga dungan sa oral iron
  • Excessive processed foods that lack nutritional densityLabis na mga processed na pagkain na kulang sa nutritional densitySobrang mga processed nga pagkaon nga kulang sa nutritional density
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Enhance iron absorption with vitamin CPalakasin ang pagsipsip ng iron gamit ang vitamin CPalig-ona ang pagsuyop sa iron gamit ang vitamin C

Vitamin C (ascorbic acid) converts non-heme iron (from plants) from ferric (Fe³⁺) to ferrous (Fe²⁺) form — the absorbable form. Squeeze calamansi or dalandan over iron-rich plant foods at mealtime. A small amount of vitamin C (50–100 mg) with oral iron supplements can increase absorption by 2–4 fold. Do not exceed 1,000 mg vitamin C supplementation — high doses increase urinary oxalate and kidney stone risk.Ang Vitamin C (ascorbic acid) ay nagko-convert ng non-heme iron (mula sa mga halaman) mula sa ferric (Fe³⁺) patungong ferrous (Fe²⁺) — ang masisipsip na anyo. Pigain ang calamansi o dalandan sa mga pagkaing may iron mula sa halaman sa oras ng kain. Ang maliit na halaga ng vitamin C (50–100 mg) kasama ang mga oral iron supplement ay maaaring magpataas ng pagsipsip ng 2–4 beses. Huwag lagpasan ang 1,000 mg ng vitamin C supplementation — ang mataas na dosis ay nagpapataas ng urinary oxalate at panganib ng kidney stone.Ang Vitamin C (ascorbic acid) nagbag-o sa non-heme iron (gikan sa mga tanum) gikan sa ferric (Fe³⁺) ngadto sa ferrous (Fe²⁺) — ang masuyop nga porma. Puga og calamansi o dalandan sa mga pagkaon nga may iron gikan sa tanum sa oras sa pagkaon. Ang gamay nga kantidad sa vitamin C (50–100 mg) uban sa mga oral iron supplement mahimong makapataas sa pagsuyop og 2–4 ka pilo. Ayaw lapasa ang 1,000 mg nga vitamin C supplementation — ang taas nga dosis nagpataas sa urinary oxalate ug peligro sa kidney stone.

Iron Status Calculator — TSAT & Iron Deficiency ClassifierKalkulador ng Katayuan ng Iron — TSAT at Iron Deficiency ClassifierKalkulador sa Kahimtang sa Iron — TSAT ug Iron Deficiency Classifier

Enter your iron panel results to calculate TSAT and determine your iron deficiency type. Your doctor uses this to decide whether IV iron, oral iron, or no iron therapy is appropriate for you.Ilagay ang inyong mga resulta ng iron panel upang kalkulahin ang TSAT at matukoy ang uri ng inyong kakulangan sa iron. Ginagamit ito ng inyong doktor upang magpasiya kung ang IV iron, oral iron, o walang iron therapy ang angkop para sa inyo.Isulod ang inyong mga resulta sa iron panel aron makalkula ang TSAT ug matino ang matang sa inyong kakulang sa iron. Gigamit kini sa inyong doktor aron magdesisyon kon ang IV iron, oral iron, o walay iron therapy ang angay alang kaninyo.

Units:
Normal: 60–160 µg/dL. Low in iron deficiency and ACD
Total Iron Binding Capacity. Normal: 250–390 µg/dL. Elevated in iron deficiency
Iron storage marker. Also reflects inflammation — unreliable in acute illness
Targets differ between dialysis and non-dialysis CKD patients (KDIGO 2024)
TSAT %
HD target >30%
Ferritin
ng/mL
Iron Status

⚕ TSAT = (Serum Iron ÷ TIBC) × 100. Ferritin is an acute phase reactant — elevated by inflammation, infection, or malignancy independent of iron stores. Classification per KDIGO 2024. This tool is for educational guidance only — iron therapy decisions require physician assessment.

Treatment Targets for CKD-Related AnemiaMga Target sa Paggamot ng Anemia na Kaugnay sa CKDMga Target sa Pagtambal sa Anemia nga May Kalabotan sa CKD

KDIGO 2024 Anemia Management Targets — Hemoglobin 100–115 g/L, Ferritin >200 ng/mL dialysis, TSAT >30% dialysis, CHr >29 pg
ParameterParameterParameterKDIGO 2024 TargetTarget ng KDIGO 2024Target sa KDIGO 2024Action if below targetAksyon kung nasa ibaba ng targetAksyon kon ubos sa targetAction if above targetAksyon kung nasa itaas ng targetAksyon kon ibabaw sa target
HemoglobinHemoglobinHemoglobin100–115 g/LEvaluate iron, initiate/increase ESA; investigate resistanceSuriin ang iron, simulan/taasan ang ESA; imbestigahan ang paglabanSusihon ang iron, sugdan/taason ang ESA; imbestigahon ang pagsukolReduce/hold ESA; investigate polycythemia causesBawasan/ihinto ang ESA; imbestigahan ang mga sanhi ng polycythemiaBawason/ihunong ang ESA; imbestigahon ang mga hinungdan sa polycythemia
Serum ferritinSerum ferritinSerum ferritin>200 ng/mL (dialysis) / >100 (pre-dialysis)IV iron supplementation (dialysis) or oral iron (pre-dialysis)IV iron supplementation (dialysis) o oral iron (pre-dialysis)IV iron supplementation (dialysis) o oral iron (pre-dialysis)>500 with active inflammation — avoid IV iron; ferritin may be falsely elevated>500 na may aktibong pamamaga — iwasan ang IV iron; ang ferritin ay maaaring maling mataas>500 nga adunay aktibong pamamaga — likayi ang IV iron; ang ferritin mahimong sayop nga taas
TSATTSATTSAT>30% (dialysis) / >20% (pre-dialysis)IV iron even if ferritin is adequate — iron-restricted erythropoiesisIV iron kahit sapat ang ferritin — iron-restricted erythropoiesisIV iron bisan igo ang ferritin — iron-restricted erythropoiesis>50% — hold IV iron; risk of iron overload>50% — ihinto ang IV iron; panganib ng iron overload>50% — ihunong ang IV iron; peligro sa iron overload
Reticulocyte Hgb content (CHr)Reticulocyte Hgb content (CHr)Reticulocyte Hgb content (CHr)>29 pgIron-restricted erythropoiesis — IV iron needed before escalating ESAIron-restricted erythropoiesis — kailangan ang IV iron bago taasan ang ESAIron-restricted erythropoiesis — gikinahanglan ang IV iron sa wala pa taason ang ESAIron replete — proceed with ESA optimizationPuno na ang iron — magpatuloy sa ESA optimizationPuno na ang iron — padayonon ang ESA optimization
Important:Mahalagang Paalala:Importante nga Pahibalo: Anemia management in CKD is complex and requires individualized assessment. Iron, ESA doses, and monitoring frequency must be tailored by your nephrologist based on your complete clinical picture.Ang pamamahala ng anemia sa CKD ay kumplikado at nangangailangan ng indibidwal na pagtatasa. Ang iron, mga dosis ng ESA, at dalas ng pagmamasid ay dapat na i-angkop ng inyong nephrologist batay sa inyong kumpletong klinikal na larawan.Ang pagdumala sa anemia sa CKD kumplikado ug nanginahanglan og indibidwal nga pagsusiha. Ang iron, mga dosis sa ESA, ug dalas sa pagbantay kinahanglan nga i-angay sa inyong nephrologist base sa inyong kompleto nga klinikal nga hulagway.
Dr. W. G. M. Rivero

W. G. M. Rivero, MD, FPCP, DPSN

Specialist in Internal Medicine, Nephrology, and Clinical Nutrition.Espesyalista king Internal Medicine, Nephrology, ampong Clinical Nutrition.Espesyalista sa Panloob na Medisina, Nefrolohiya, at Klinikal na Nutrisyon.Espesyalista sa Internal nga Medisina, Nefrolohiya, ug Klinikal nga Nutrisyon. Practicing evidence-based nephrology across Quezon City, Pampanga, and Bulacan.Nagsasagawa ng evidence-based nephrology sa Quezon City, Pampanga, at Bulacan.Nagbuhat og evidence-based nephrology sa Quezon City, Pampanga, ug Bulacan.

PRC 0105184 · seriousmd.com/doc/williamrivero ·

Nephrology · Internal Medicine · Clinical Reference

Anemia in CKD: Clinical Management Guide

KDIGO 2024-aligned protocols for iron optimization, ESA dosing, HIF-PHI integration, and dialysis-specific anemia workflows. Evidence-based decision support for nephrologists and internists.

KDIGO 2024 Aligned CKD ND · HD · PD ESA Protocols Iron Titration HIF-PHI Overview Dialysis-Focused

Quick Clinical Overview

CKD Anemia Clinician Management Framework — pathophysiology flow, therapy pillars, clinical consequences

WHO / KDIGO Diagnostic Thresholds

Men
Anemia < 130 g/L
Women
Anemia < 120 g/L
CKD ND target
100 – 115 g/L
HD / PD target
100 – 115 g/L
Avoid > 130
↑ CV risk / thrombosis

KDIGO 2024: CKD anemia = Hb below sex-specific threshold without obvious non-renal cause. Evaluate at any CKD stage. Screen every 3 months in HD/PD, every 6 months in CKD G3–G5 ND.

Pathophysiology at a Glance

  • EPO deficiency — decreased interstitial fibroblast EPO synthesis proportional to GFR loss; dominant mechanism in advanced CKD
  • Hepcidin excess — inflammation + reduced renal clearance → iron sequestration, impaired duodenal absorption, blocked ferroportin
  • Shortened RBC lifespan — uremic toxins accelerate RBC destruction; normal 120d → ≈60–80d in ESKD
  • Marrow suppression — uremic toxins, hyperparathyroidism-driven fibrosis
  • Blood loss — dialyzer clotting, frequent phlebotomy, occult GI bleeding

Top 5 Missed Causes in CKD

  1. Concurrent iron deficiency — especially absolute IDA from GI blood loss or menorrhagia (TSAT <20%, ferritin <100); missed when EPO deficiency assumed
  2. B12 / Folate deficiency — common in dialysis; dialysis removes water-soluble vitamins; CBC shows macrocytosis masked by microcytosis
  3. Underdialysis — Kt/V <1.2 raises uremic toxin burden → EPO hyporesponsiveness; check URR and Kt/V in resistant anemia
  4. Hyperparathyroidism — PTH >500 pg/mL suppresses erythropoiesis and causes marrow fibrosis; treat secondary HPT to improve Hb
  5. Pure Red Cell Aplasia (PRCA) — rare but serious; anti-EPO antibodies after subcutaneous epoetin; suspect if Hb drops precipitously on ESA; requires bone marrow biopsy confirmation
🩺 Clinical Pearl

In a dialysis patient with ESA hyporesponsiveness: always check TSAT first. Functional iron deficiency (TSAT <20% despite ferritin ≥200) is the most common reversible cause. IV iron challenge often restores Hb 8–12 g/L without any ESA dose increase.

⚠️ Diagnostic Pitfall

Serum ferritin is an acute-phase reactant. In active infection or inflammation, ferritin >500 ng/mL does NOT exclude iron deficiency. TSAT <20% + ferritin >500 = functional iron deficiency; trial IV iron if Hb below target and no contraindication.

Screening & Evaluation

CKD Anemia Pathophysiology Cascade — EPO deficiency, hepcidin, iron sequestration, shortened RBC lifespan, clinical consequences

Initial Anemia Workup

Essential
CBC with differential
Hb, MCV, MCHC, reticulocyte count; MCV <80 fL = microcytic; >100 fL = macrocytic
Iron Studies
Serum iron, TIBC, ferritin, TSAT
TSAT = (serum iron ÷ TIBC) × 100; repeat at minimum q3 months in HD patients
Reticulocytes
Reticulocyte Hb content (CHr/RetHe)
CHr <29 pg = iron-restricted erythropoiesis even when ferritin "normal"; best early iron deficiency marker
Vitamins
Serum B12, folate (RBC folate preferred)
Supplement empirically in dialysis; losses occur each session
Renal
PTH, albumin, CRP/ESR
High PTH → marrow fibrosis; CRP elevation → functional iron deficiency, EPO hyporesponsiveness
GI Screen
Fecal occult blood (if indicated)
GI blood loss 2–3× more common in CKD; consider endoscopy if TSAT <20% with unexplained IDA
Dialysis
Kt/V or URR (HD/PD patients)
Underdialysis is a reversible cause of EPO hyporesponsiveness; target Kt/V ≥1.4
PRCA Screen
Anti-EPO antibodies (if suspected)
Suspect if: rapid Hb drop >5–10 g/L/month on ESA, reticulocytes <10,000/µL; requires bone marrow biopsy

Ferritin / TSAT Interpretation Matrix

Ferritin / TSAT TSAT < 20% TSAT 20–30% TSAT > 30%
Ferritin < 100 ng/mL Absolute IDA
IV iron indicated
IDA likely
IV iron consider
Rare; check hemolysis
Ferritin 100–500 ng/mL Functional IDA
IV iron trial (esp. HD)
Iron adequate
Optimize ESA
Iron replete
Review ESA dose
Ferritin 500–800 ng/mL Functional IDA
IV iron with caution
Borderline overload
Hold iron; treat inflammation
Overload risk
Hold iron; investigate
Ferritin > 800 ng/mL Likely inflammation
Treat cause; withhold iron
Hemosiderosis risk
Withhold iron
Iron toxicity risk
Withhold iron; MRI liver if >1500

Thresholds per KDIGO 2024. HD: TSAT target ≥30%, ferritin 200–800 ng/mL. CKD ND/PD: TSAT ≥20%, ferritin ≥100 ng/mL.

KDIGO 2024 Targets & Thresholds

CKD Anemia Clinical Thresholds Quick Reference — anemia diagnosis, iron initiation, ESA initiation, hemoglobin targets, hold parameters

Hemoglobin Targets

CKD ND Target
100–115
g/L
Do not intentionally exceed 130 g/L; no target >115 without individual assessment
HD Target
100–115
g/L
CHOIR/TREAT: Hb >130 g/L → ↑ CV events, thrombosis, death
PD Target
100–115
g/L
Same targets as HD; iron losses less in PD but EPO deficiency similar
ESA Hold Threshold
> 130
g/L
Reduce/hold ESA if Hb exceeds this; resume when Hb <120 g/L

Iron Initiation / Hold Thresholds

Hold IV Iron
Ferritin > 800
ng/mL
Regardless of TSAT; risk of hepatic siderosis and oxidative injury
Caution Zone
Ferritin 500–800
ng/mL
Weigh benefit vs. risk; consider if TSAT <20% and Hb below target
Adequate (HD)
TSAT ≥ 30%
Ferritin ≥ 200 ng/mL
Optimize ESA dosing if Hb still suboptimal
Adequate (ND/PD)
TSAT ≥ 20%
Ferritin ≥ 100 ng/mL
Reassess every 3–6 months

Monitoring Schedule

ParameterCKD ND (G3–G5)HDPD
HemoglobinEvery 3–6 monthsMonthly (pre-dialysis)Every 3 months
Iron studies (Fe, TIBC, ferritin, TSAT)Every 6 monthsEvery 3 monthsEvery 3 months
B12 / FolateAnnually or if macrocytosisEvery 6 monthsEvery 6 months
PTHEvery 6–12 months (G4–G5)Every 3 monthsEvery 3 months
ESA response assessment4 weeks after dose changeMonthly pre-dialysis HbMonthly Hb

Iron Therapy

IV Iron Decision Tree in CKD — ferritin and TSAT-based branches for oral iron, IV repletion, maintenance, or hold
Iron Status Interpretation Matrix — ferritin vs TSAT quadrants: absolute deficiency, functional deficiency, adequate, overload risk

Oral vs. IV Iron: Selection Guide

FactorFavor Oral IronFavor IV Iron
CKD stageCKD G1–G4 ND, mild deficiencyCKD G5D (HD/PD), G4–G5 ND with severe IDA
GI toleranceGI symptoms tolerable; try ferrous sulfate 325 mg TID or ferrous gluconateGI intolerance, malabsorption, IBD, post-bariatric surgery
Speed of correctionSlower (weeks to months)Faster (2–4 weeks)
HD accessNot applicableCan be given intra-dialysis (cost-effective)
Infection riskLowerAvoid during active bacteremia; delay 1–2 weeks until resolved

IV Iron Formulations

Iron Sucrose (Ferrofer® / Venofer® / Anema®)
Dose (HD)100 mg IV per dialysis session × 10 sessions (1,000 mg loading); maintenance 25–100 mg/session as needed
Dose (CKD ND/PD)200–300 mg IV over 1.5–2 hours × 3–5 doses (cumulative 1,000 mg); maximum single dose 500 mg
SafetyGood; lower anaphylaxis risk than iron dextran; test dose not required
PhilippinesWidely available; first-line IV iron in most Philippine dialysis centers
Ferric Carboxymaltose (Ferinject®)
Dose500–1,000 mg IV over 15–60 min; single dose up to 1,000 mg; repeat at 7 days if needed
AdvantageHigh single-dose capability; no test dose; ideal for outpatient repletion in CKD ND
CautionHypophosphatemia in ~10% (FGF-23 mediated); check phosphate 4 weeks post-dose
PhilippinesAvailable; higher cost than iron sucrose
Sodium Ferric Gluconate (Ferrlecit®)
Dose125 mg IV per HD session × 8 sessions; dilute in 100 mL NS, infuse over 1 hour
SafetyGood; anaphylaxis rare; lower iron content per vial than iron sucrose
NoteRequires more sessions for full repletion; useful when small incremental dosing preferred
Low Molecular Weight Iron Dextran (INFeD®)
DoseTotal dose infusion or divided doses; test dose 25 mg required due to dextran allergy risk
RiskHighest anaphylaxis risk among IV irons; high molecular weight dextran (Dexferrum®) carries greater risk — avoid
NoteUse only when other formulations unavailable; have resuscitation equipment ready
⛔ Avoid IV Iron During Active Infection

Iron is a bacterial growth factor. IV iron during active bacteremia or sepsis promotes bacterial proliferation and worsens outcomes. Delay IV iron at least 1–2 weeks until infection resolved. Oral iron acceptable if truly required.

⛔ Do Not Exceed Ferritin 800 ng/mL

Sustained ferritin >800 ng/mL is associated with hepatic iron overload and oxidative injury. If ferritin rises above 800 on maintenance IV iron, hold iron and recheck in 3 months.

ESA Therapy

ESA Comparison — Epoetin Alfa (Eprex/Eposino), Epoetin Beta (Recormon), Darbepoetin Alfa (Nesp/Aranesp), CERA (Mircera): half-life, frequency, starting dose, route, Philippines availability

Agent Comparison

AgentHalf-LifeFrequencyStarting DoseRouteNotes
Epoetin Alfa
Eprex® (Janssen), Eposino® (Goodfellow)
6–8 h IV; 24 h SC2–3×/week50–100 IU/kg SC or IVSC preferred (ND/PD); IV (HD)First-generation ESA; widely available in PH dialysis centers. Biosimilars available.
Epoetin Beta
Recormon® (Roche)
6–8 h IV; 24 h SC2–3×/week20–80 IU/kg SC or IV 3×/weekSC preferred; IV during HDDistinct glycosylation from alfa; same EPO receptor, comparable clinical efficacy. Available in 2,000 / 5,000 / 10,000 IU prefilled syringes. Not interchangeable unit-for-unit without physician confirmation.
Darbepoetin Alfa
Nesp® (Kyowa Kirin), Aranesp® (Amgen)
25 h IV; 48 h SCWeekly or q2 weeks0.45 µg/kg once weeklySC or IV~3× longer half-life than epoetin; q2w dosing in stable patients. Nesp available in PH. Conversion: 200 IU epoetin = 1 µg darbepoetin.
Methoxy PEG-epoetin beta
(CERA / Mircera®)
130 h SCMonthly0.6 µg/kg SC monthlySC or IVMonthly dosing → better adherence; conversion: 200 IU epoetin ≈ 1 µg darbepoetin ≈ 4 µg CERA
Biosimilar epoetinSimilar to originator3×/weekSame as referenceSC or IVNon-interchangeable without physician oversight; PRCA risk same as originator

ESA Dosing Principles

1
Ensure Iron Adequate Before Starting ESA

TSAT ≥20% (ND/PD) or ≥30% (HD); ferritin ≥100 (ND/PD) or ≥200 ng/mL (HD). ESA without adequate iron stores produces suboptimal response and excessive ESA use.

2
Start Low, Titrate Gradually

Target Hb rise of 10–20 g/L per month. Rises >20 g/L/month → reduce dose 25%. Rises <10 g/L at 4 weeks → investigate cause; consider 25% dose increase if iron adequate.

3
Hold ESA When Hb > 130 g/L

Resume at 25% lower dose when Hb falls to <120 g/L. CHOIR and TREAT trials demonstrated clear harm with high Hb targets.

4
Use Lowest Effective Dose

ESA Resistance Index (ERI) >10 IU/kg/week/g/dL is independently associated with adverse outcomes. High ERI should trigger search for modifiable causes before dose escalation.

Key ESA Risks

Cardiovascular & Thrombotic Risks

  • Higher Hb targets (120–140 vs 100–115 g/L) → ↑ stroke, MI, AV fistula thrombosis
  • ESA-stimulated erythropoiesis → ↑ platelet aggregation, blood viscosity
  • Hypertension exacerbation common; check BP at each visit during initiation
  • TREAT trial: darbepoetin → 2× stroke risk when targeting Hb ≥130 g/L

Tumor Promotion Concern

  • EPO receptors expressed on some solid tumors (breast, head & neck, lung)
  • ESA in chemotherapy-related anemia associated with shorter survival in some RCTs
  • In CKD: no clear evidence of de novo tumor promotion, but caution in active malignancy
  • KDIGO 2024: ESA acceptable in CKD + malignancy but avoid high Hb targets

ESA & Iron Titration Protocols

ESA Dose Adjustment Ladder — increase 25%, maintain, reduce 25–50%, hold based on hemoglobin trends and target zone

Hb Response-Based Titration Ladder

Hb > 130 g/L
HOLD ESA

Withhold ESA dose. Recheck Hb in 4 weeks. Resume at 25% lower dose when Hb <120 g/L. Evaluate for polycythemia causes if persistent.

Hb 110–130 g/L
MAINTAIN — Upper Zone

Approaching upper limit. If rising >20 g/L/month, reduce ESA dose 25% preemptively. Confirm iron adequate (TSAT ≥30% HD).

Hb 100–110 g/L
MAINTAIN — Optimal Zone

Target range for most CKD patients. Maintain current ESA dose. Monitor monthly (HD) or q3 months (ND). Check iron quarterly.

Hb 90–100 g/L
TITRATE UP 25%

Below target. Exclude: iron deficiency (check TSAT), active infection, missed ESA doses. If iron replete and no infection: increase ESA 25%, recheck in 4 weeks.

Hb < 90 g/L
URGENT ASSESSMENT

Investigate acute causes: blood loss, hemolysis, PRCA, severe infection. IV iron if TSAT <20%. Increase ESA 50% if no reversible cause. Consider transfusion if symptomatic or Hb <70 g/L.

Monthly HD Anemia Workflow

1
Pre-Dialysis Hb (Monthly)

Check Hb before first session of the month (not same day as iron infusion). Document trend: rising / stable / falling.

2
Iron Studies (Quarterly)

TSAT and ferritin q3 months minimum. If TSAT <30% or ferritin <200: add/increase maintenance IV iron. If ferritin >800: hold iron.

3
ESA Dose Review

Compare this month's Hb to last. Apply titration ladder. Calculate ERI (weekly ESA IU/kg ÷ Hb g/dL). ERI >10 → investigate hyporesponsiveness causes.

4
Document & Adjust

Record: Hb, TSAT, ferritin, ESA dose, ERI, IV iron given, clinical notes. Flag if Hb outside 100–115 g/L for 2 consecutive months.

ESA Hyporesponsiveness

ESA Hyporesponsiveness Evaluation Flowchart — sequential workup: iron, inflammation, infection, dialysis adequacy, PTH, bleeding, nutrition, aluminum, malignancy

Definition (KDIGO 2024): Failure to achieve target Hb (≥100 g/L) despite epoetin alfa ≥450 IU/kg/week SC or ≥300 IU/kg/week IV (or equivalent darbepoetin ≥1.5 µg/kg/week), after correcting iron deficiency. Alternatively: requirement for >3× the usual maintenance ESA dose to maintain target Hb.

Causes Checklist

Iron & Nutrition

  • Absolute iron deficiency (TSAT <20%, ferritin <100)
  • Functional iron deficiency (TSAT <20%, ferritin 100–500)
  • Vitamin B12 deficiency (check serum B12, homocysteine)
  • Folate deficiency (common in dialysis — dialysis-related losses)
  • Malnutrition / low albumin (ESA response correlates with nutritional status)

Systemic / Dialysis Factors

  • Active infection or inflammation (↑ CRP → ↑ hepcidin → iron sequestration)
  • Underdialysis (Kt/V <1.2): uremic toxin accumulation suppresses erythropoiesis
  • Hyperparathyroidism (PTH >500 pg/mL → marrow fibrosis)
  • Hemolysis (check LDH, reticulocytes, haptoglobin)
  • Occult blood loss (GI, dialyzer clotting, access bleeding)
  • ACE inhibitor use (suppresses angiotensin-mediated erythropoiesis)

Pure Red Cell Aplasia (PRCA) — Rule Out

Suspect PRCA when: (1) Hb drops rapidly (>5–10 g/L/month) on ongoing ESA therapy, (2) reticulocyte count <10,000/µL, (3) other cytopenias absent. Confirm: anti-EPO antibody titer (reference lab) + bone marrow biopsy (erythroid hypoplasia with normal myeloid/platelet lineages). Manage: Stop all ESA immediately — do NOT switch brands (antibodies cross-react). Immunosuppression (prednisolone ± cyclophosphamide or cyclosporine). Kidney transplant often resolves PRCA. Do NOT restart any ESA until antibody-negative and erythroid recovery confirmed. Report to pharmacovigilance.

HIF Prolyl Hydroxylase Inhibitor (HIF-PHI) Therapy

HIF-PHI Mechanism of Action — PHD inhibition, HIF stabilization, endogenous EPO production, improved iron utilization, increased RBC production

Mechanism of Action

HIF-PHIs inhibit prolyl hydroxylase domain (PHD) enzymes, preventing HIFα degradation. Stabilized HIF-1α/HIF-2α translocate to the nucleus → transcription of EPO (liver & kidney), iron absorption genes (DMT1, ferroportin), and transferrin receptor. Net effect: ↑ endogenous EPO + improved iron mobilization, partially overcoming hepcidin-mediated iron restriction.

Available Agents

AgentRouteRegulatory Status
Roxadustat (Evrenzo®)Oral TIDEU, Japan, China; FDA rejected 2021
Daprodustat (Jesduvroq®)Oral dailyFDA approved 2023 (dialysis CKD)
Vadadustat (Vafseo®)Oral dailyFDA approved 2023 (dialysis CKD)
Molidustat (Masalera®)Oral dailyJapan approved; others pending
⚠️ Safety Signals — Do Not Overlook

ASCEND-D and PRO2TECT trials showed non-inferiority for MACE vs. ESA in HD patients but potential harm in non-dialysis CKD (vadadustat ND: ↑ MACE trend). All HIF-PHIs carry theoretical oncologic concern (HIF-1α promotes tumor angiogenesis via VEGF). Avoid in active or recent (<3 years) solid malignancy. Also: ↑ thrombosis risk; do not combine with ESA. Philippines: regulatory approval pending as of 2025 — not yet commercially available for routine use.

Current Role in Practice

HIF-PHIs are an alternative to ESA in HD patients who are ESA-hyporesponsive, ESA-intolerant, or prefer oral therapy. Iron stores must still be optimized. Best suited for stable ESKD patients without active malignancy or high CV risk. Monitoring: CBC monthly, LFTs q3 months, blood pressure closely during titration.

Transfusion Strategy in CKD Anemia

Transfusion Decision Algorithm in CKD — decision nodes for symptomatic anemia, cardiovascular instability, bleeding, transplant candidacy; transfusion risks panel

Why to Avoid pRBC Transfusion in CKD

Pre-Transplant Sensitization

Each transfusion exposes the recipient to foreign HLA antigens → panel reactive antibody (PRA) formation. PRA >50% dramatically narrows compatible donor pool for kidney transplant. A single transfusion can double PRA. Use leukoreduced, CMV-negative blood if transfusion unavoidable in transplant candidates.

Iron Overload, Volume & CV Risk

  • Each pRBC unit contains ~200–250 mg iron → hemosiderosis with repeated transfusions
  • Volume overload risk in anuric ESKD patients; transfuse during dialysis session if possible
  • Transfusion-associated circulatory overload (TACO) risk in fluid-restricted HD patients
  • Alloimmunization, febrile reactions, TRALI (rare)

Transfusion Indications

IndicationThresholdNotes
Symptomatic anemia (dyspnea, angina, altered consciousness)Any Hb with symptomsSymptom-guided, not number-guided; treat underlying cause simultaneously
Acute hemorrhage with hemodynamic instabilityAny Hb + instabilityIdentify and stop bleeding source; massive transfusion protocol if applicable
Asymptomatic severe anemiaHb <70 g/LPrefer IV iron/ESA where time permits; transfuse during dialysis in ESKD
Pre-surgical optimization (elective)Hb <80 g/L before major surgeryPrefer IV iron/ESA pre-loading if >3–4 weeks pre-op; minimize HLA sensitization
ESA/iron refractory chronic anemiaHb persistently <70 g/LMaximize iron and ESA first; rule out PRCA; consider transplant referral

Dialysis-Specific Anemia Management

Anemia Contributors in Hemodialysis Patients — blood losses, repeated lab draws, GI bleeding, catheter inflammation, inflammatory cytokines, reduced erythropoiesis
Monthly Hemodialysis Anemia Management Cycle — Week 1 CBC review, Week 2 ESA adjustment, Week 3 inflammation review, Week 4 iron reassessment

HD Blood Losses

  • Dialyzer clotting: 3–5 mL blood per clotted line/dialyzer; optimize anticoagulation (heparin or regional citrate); use high-flux membranes
  • Needle access: AV fistula needle trauma; needle gauge and technique affect blood loss
  • Frequent phlebotomy: 3 HD sessions/week × blood draws ≈ 1 L blood loss/year; use micro-sampling tubes
  • Occult GI bleeding: Uremia → platelet dysfunction, angiodysplasia; annual FOBT or endoscopy if unexplained IDA

Dialysis Adequacy & Anemia

Kt/V <1.2 → EPO hyporesponsiveness. Uremic toxins (indoxyl sulfate, ADMA) directly suppress erythropoiesis and shorten RBC lifespan. Improving dialysis adequacy often reduces ESA requirement.

  • Check Kt/V every 3 months; target ≥1.4 (single-pool) in HD
  • Increase session length or frequency if Kt/V suboptimal
  • High-flux dialysis improves middle molecule clearance and may improve ESA response
  • PD: maintain peritoneal adequacy (weekly Kt/V ≥1.7 for CAPD)

PD-Specific Considerations

  • Lower blood losses: PD patients have less dialyzer-related blood loss than HD, but peritoneal cavity protein losses can impair ESA response
  • SC ESA preferred: Subcutaneous epoetin or darbepoetin 1–3×/week; CERA monthly SC excellent compliance tool in PD
  • IP EPO: Intraperitoneal administration achieves systemic levels but absorption variable; not standard practice
  • Iron stores: Oral iron may be adequate in early PD; IV iron as needed if TSAT <20% or oral-intolerant

Practical Clinical Algorithms

Low Hemoglobin Evaluation Algorithm in CKD — confirm anemia, assess iron, evaluate inflammation, identify bleeding, initiate therapy, reassess response

Algorithm A: New or Worsening Low Hb in CKD

1
Confirm Anemia

Hb <130 (men) / <120 (women) g/L on repeat CBC. Exclude lab error or dilution effect (blood drawn near IV fluid site or from access line).

2
Iron Workup First

Check TSAT and ferritin. If TSAT <20%: treat iron deficiency first. IV iron in HD/PD; trial oral iron in CKD ND. Recheck Hb and iron in 4–8 weeks before initiating ESA.

3
Exclude Non-Renal Causes

MCV evaluation: microcytic → IDA/thalassemia; macrocytic → B12/folate. Check B12, folate, reticulocytes, CRP, LDH, haptoglobin, FOBT. Address all reversible causes before escalating ESA.

4
ESA Initiation Decision

Start ESA if: Hb persistently <100 g/L, iron replete (TSAT ≥20%), non-renal causes excluded. Discuss risks/benefits with patient. Caution in pre-transplant candidates and active malignancy.

5
Titrate to Target

Apply titration ladder. Target Hb 100–115 g/L. Reassess monthly (HD) or q3 months (ND). Never target >130 g/L.

Algorithm B: Ferritin High + TSAT Low (Functional Iron Deficiency)

1
Define the Pattern

TSAT <20% + ferritin >100 ng/mL (or >200 in HD) = functional iron deficiency. Hepcidin blocks iron export from stores → low circulating iron despite adequate total body iron.

2
Look for Driver

Check CRP — elevated CRP is the most common cause (acute or chronic inflammation). Also: active infection, recent surgery, malignancy. Treat the inflammatory cause if possible.

3
IV Iron Trial (Ferritin < 500)

If ferritin <500 and Hb below target: trial IV iron (iron sucrose 100–200 mg IV). Monitor TSAT and Hb 4 weeks later. Functional IDA often responds with Hb +8–12 g/L.

4
Ferritin 500–800: Individualize

Weigh benefit vs. overload risk. If strong inflammatory state: treat inflammation first, then reassess. If TSAT still <20% after CRP normalizes: IV iron acceptable with monitoring.

5
Ferritin > 800: Hold Iron

Withhold IV iron. Investigate hepatic iron overload (LFTs, consider MRI liver T2*). Treat infection/inflammation. Reassess when ferritin <800 and CRP normalizes.

Case-Based Clinical Pearls

CKD Anemia Clinical Case Snapshots — four case cards with lab trends, dialysis status, diagnostic clues, and teaching pearls
Case 1
HD Patient — ESA Hyporesponsiveness with Elevated Ferritin
Hb 85 g/L TSAT 14% Ferritin 620 ng/mL CRP 48 mg/L Epoetin 400 IU/kg/week Kt/V 1.38

Presentation: 58-year-old male on HD × 4 years. Hb declining over 3 months despite epoetin dose escalations. Currently on 400 IU/kg/week. Ferritin reported as "elevated" — no IV iron given. AV fistula revision surgery 6 weeks prior.

Analysis & Management

Ferritin elevation is post-surgical/inflammatory (CRP 48). TSAT 14% = functional iron deficiency despite "high" ferritin. Erythropoiesis is iron-restricted. Action: (1) IV iron sucrose 100 mg × 3 doses over next 3 HD sessions; (2) hold ESA dose escalation; (3) recheck Hb + iron studies in 4 weeks. Expected: TSAT ↑ → Hb ↑ 8–12 g/L. ESA dose should be reducible once iron adequate — never escalate ESA without first addressing iron stores.

Case 2
PD Patient — New Anemia, Don't Miss Non-Renal Causes
Hb 78 g/L (was 105 g/L × 6 months) MCV 72 fL TSAT 12% Ferritin 28 ng/mL Peritoneal Kt/V 1.8

Presentation: 67-year-old female on CAPD × 2 years. Previously stable Hb on darbepoetin 0.45 µg/kg/week. New microcytic anemia over 6 weeks. No dose change. Peritoneal adequacy maintained. No abdominal symptoms.

Analysis & Management

New microcytic anemia + low TSAT + low ferritin = absolute iron deficiency. In a stable PD patient, this is NOT explained by EPO deficiency alone (EPO deficiency causes normocytic anemia). New IDA demands investigation for blood loss. (1) FOBT and GI evaluation (angiodysplasia risk in elderly CKD patients); (2) check for menorrhagia in younger women. Start IV iron (iron sucrose 200 mg IV × 2–3 doses). GI endoscopy revealed sigmoid angiodysplasia → argon plasma coagulation. Hb recovered to 108 g/L on same ESA dose.

Case 3
CKD ND — Hb Overshooting on ESA
Hb 138 g/L (was 98 g/L × 12 weeks ago) Darbepoetin 0.45 µg/kg weekly × 12 weeks TSAT 38% BP 165/98 mmHg

Presentation: 52-year-old male, CKD G4 (eGFR 18). Started darbepoetin 12 weeks ago. Hb rose rapidly from 98 → 138 g/L. BP poorly controlled. Patient feels "great" and is reluctant to reduce dose.

Analysis & Management

Hb >130 g/L = hold ESA immediately. Do NOT target maximum Hb — CHOIR trial: Hb 135 vs. 113 g/L target → 34% ↑ composite cardiovascular events. Action: (1) hold darbepoetin; (2) aggressive antihypertensive management; (3) recheck Hb monthly; (4) resume darbepoetin at 25% lower dose when Hb <120 g/L. Counsel patient: higher Hb = higher stroke and AV fistula thrombosis risk. Target is 100–115 g/L, not maximum tolerated.

Case 4
HD Patient — Suspected Pure Red Cell Aplasia (PRCA)
Hb 64 g/L (dropped 28 g/L in 6 weeks) Reticulocytes <5,000/µL Normal WBC & platelets SC epoetin alfa × 3 years TSAT 32%, Ferritin 410 CRP normal

Presentation: 61-year-old male on HD. Hb stable at 105–112 g/L for years on epoetin alfa 150 IU/kg SC 3×/week. Over 6 weeks: Hb plummets to 64 g/L. Iron studies adequate. CRP normal. No GI symptoms. Reticulocytes severely suppressed.

Analysis & Management

PRCA must be ruled out. Hallmarks: rapid Hb fall on established ESA, severe reticulocytopenia, normal other cell lines, adequate iron, no infection. Action: (1) STOP epoetin alfa immediately — do NOT switch to another brand (antibodies cross-react with all epoetin-class agents including biosimilars); (2) anti-EPO antibody titer (send serum to reference lab); (3) bone marrow biopsy (erythroid hypoplasia with normal myeloid/megakaryocyte lineages); (4) transfuse as needed for symptomatic anemia; (5) if PRCA confirmed: prednisolone 1 mg/kg/day ± cyclosporine or cyclophosphamide; (6) consider accelerated transplant listing — transplant often resolves PRCA. Report case to pharmacovigilance authority.

Downloadable Clinical Tools

Clinician Toolkit Preview — ESA dose chart, ferritin interpretation card, dialysis checklist, KDIGO reference poster, algorithm flowchart
Monthly HD Anemia Checklist — lab targets, ESA tracking, IV iron log, clinical review

📋 Monthly HD Anemia Checklist

Pre-dialysis labs, ESA tracking, IV iron log, clinical review. Complete monthly — print to PDF for patient chart.

Patient Information
🔬 Labs This Month
Pre-Dialysis Hemoglobin
Target: 10.0–11.5 g/dL (100–115 g/L)
TSAT
Target: ≥20%; hold IV iron if >50%
Serum Ferritin
Target: 200–500 ng/mL; hold IV iron >800
Reticulocyte % (optional)
Normal 0.5–1.5%. Sudden drop + falling Hgb on ESA → rule out PRCA
💉 ESA Dose Log
IU for epoetin; µg for darbe/CERA
Enter above →
ERI >10 → investigate hyporesponsiveness
🩸 IV Iron Log (This Month)
Sum of all doses this month
✅ Clinical Review

⚕ Targets per KDIGO Anemia 2024. Hgb 100–115 g/L; TSAT ≥20%; Ferritin 200–500 ng/mL (HD). Adapt to individual patient context. For clinical use by licensed physicians only.

⚖️ ESA Resistance Index (ERI) Calculator

ERI = Weekly ESA dose (IU/kg/week) ÷ Hemoglobin (g/dL). ERI >10 indicates hyporesponsiveness — investigate before escalating dose.

Epoetin alfa/beta: enter IU. Darbepoetin and CERA: enter µg → converted to IU (×200)
Enter dose in IU (epoetin) or µg (darbepoetin/CERA)
Used to calculate weekly IU equivalent
Dry weight preferred in dialysis patients
Pre-dialysis Hgb for HD patients; most recent value

⚕ ERI = (Total weekly ESA dose in IU ÷ weight in kg) ÷ Hgb in g/dL. Epoetin alfa (Eprex, Eposino) and epoetin beta (Recormon) are both IU-based — enter dose directly. Darbepoetin alfa (Nesp, Aranesp) and CERA (Mircera) are entered in µg and converted using 1 µg = 200 IU epoetin equivalent. ERI >10 IU/kg/week/g/dL is associated with increased cardiovascular mortality and hospitalizations (Kalantar-Zadeh et al.). Interpret alongside clinical context. For educational use only — dosing decisions require physician assessment.

IV Iron Protocol Reference Card — Philippines formulary guide with dosing, infusion rates, and monitoring for iron sucrose, ferric carboxymaltose, and iron dextran

💊 IV Iron Protocol Reference Card

Philippines formulary guide — formulations, doses, infusion rates, and monitoring requirements.

🚫 Absolute Contraindications — Withhold IV Iron If:
• Active bacterial infection (sepsis, bacteremia) • Known hypersensitivity to any IV iron formulation • Serum ferritin >800 ng/mL • Iron overload (hemochromatosis, hemosiderosis) • First trimester of pregnancy (relative — seek specialist advice)
FORMULATION DOSE (HD) INFUSION RATE TEST DOSE NOTES (Philippines)
Iron Sucrose
Ferrofer®, Venofer® (generics available)
100–200 mg / session
Loading: 100 mg ×10 sessions
Maintenance: 100 mg/1–2 sessions
Slow IV push 15 min
or dilute in 100 mL NS, infuse 30 min
Not required First-line PH formulary. Available at most dialysis centers. Low anaphylaxis risk. Observe 30 min post-infusion.
Ferric Carboxymaltose
Ferinject® (Vifor/CSL Behring)
500–1000 mg single dose
Max 1000 mg/week; repeat at 4–8 weeks if still deficient
15–60 min IV infusion
Dilute in ≥100 mL NS
Not required Preferred for non-dialysis CKD (single high-dose visit). Monitor for hypophosphatemia: check PO₄ at 1–2 weeks post-infusion. Higher cost than iron sucrose.
LMW Iron Dextran
CosmoFer® / INFeD® (generics)
25 mg test → 100 mg maintenance
Or total dose infusion (TDI) in selected cases
25 mg test over 15 min → wait 60 min → main dose over 1 hr Required
Anaphylaxis risk
Higher anaphylaxis risk vs iron sucrose/FCM. Premedicate: antihistamine + hydrocortisone. Resuscitation equipment at bedside. Second-line only.
Ferumoxytol
Rienso® / Feraheme®
510 mg; repeat at 3–8 days
Max 1,020 mg per course
15 min IV infusion
Monitor BP closely during infusion
Not required ⚠ Limited PH availability as of 2025 — verify FDA-PH registration before prescribing. Interferes with MRI interpretation for up to 3 months.
🎯 Iron Repletion Targets (KDIGO 2024)
TSAT: ≥20% (upper safety limit: 50%)
Ferritin (HD): 200–500 ng/mL (withhold IV iron >800)
Ferritin (ND-CKD): 100–300 ng/mL
Hgb target: 100–115 g/L
Recheck labs: every 1–3 months on ESA; monthly if adjusting
⚠ Post-Infusion Monitoring (All Formulations)
Observe patient minimum 30 min after infusion completion
Monitor: BP, HR, urticaria, wheezing, facial flushing, chest tightness
FCM-specific: check PO₄ at 1–2 weeks post-infusion (hypophosphatemia)
Recheck TSAT + ferritin 4–8 weeks after completing loading dose
✅ When to Give IV vs Oral Iron
IV iron preferred: HD patients (all), CKD + oral iron intolerance, TSAT critically low (<15%), significant hepcidin elevation
Oral iron OK: ND-CKD Stages 1–3, mild deficiency, compliant patient, no absorption failure

⚕ Dosing based on KDIGO Anemia 2024 and Philippine Society of Nephrology consensus. Adapt to local formulary availability and patient clinical status. For clinical use by licensed physicians only.

Patient Handout — Understanding Your Anemia: kidney EPO connection, symptoms, treatment options, and when to call your doctor

🧑‍⚕️ Patient Handout — Understanding Your Anemia

Plain-language guide in English, Tagalog, and Cebuano. Print for clinic use — may be freely photocopied for patients.

🫘 What Is Anemia?

Your kidneys normally make a hormone called erythropoietin (EPO) that tells your bone marrow to produce red blood cells. In CKD, damaged kidneys make less EPO — without this signal, your body makes fewer red blood cells. Fewer red blood cells means less oxygen reaches your organs.

1 in 3 people with CKD has anemia
😴 How You May Feel
  • Unusual tiredness or weakness
  • Pale or yellowish skin
  • Feeling cold all the time
  • Dizziness or lightheadedness
  • Shortness of breath with activity
  • Fast or fluttering heartbeat
  • Difficulty concentrating
💊 Your Treatment Plan

Iron supplements — Oral iron tablets or IV iron drip given at dialysis. Iron feeds your red blood cells.

EPO injections (ESA) — A medicine that signals your bone marrow to make red blood cells, replacing what your kidneys can't produce. Common brands: Recormon (epoetin beta), Eprex / Eposino (epoetin alfa), Nesp (darbepoetin alfa, weekly), Mircera (monthly injection).

Iron-rich foods — Red meat, dark leafy greens, beans, fortified cereals. Ask your dietitian for a kidney-safe food list.

📞 Call Your Doctor If:
  • You feel much more tired than usual
  • Chest pain or shortness of breath at rest
  • You appear unusually pale
  • Fever, chills, or signs of infection
  • Dark or bloody stools
  • Dizziness or fainting
Regular blood tests are key. Your hemoglobin, iron levels, and EPO response are checked monthly. Work closely with your nephrologist — managing anemia protects your heart and kidneys.

⚕ For patient education only. Based on KDIGO Anemia 2024 guidelines. May be freely photocopied for patient distribution in clinic settings. Content does not replace a consultation with your physician.

Evidence & Guidelines

CKD Anemia Evidence Summary — forest plot of PIVOTAL, CHOIR, TREAT, ASCEND-D, PRO2TECT trials with interventions, populations, and outcome directions

Key Clinical Trials

Trial N Population Intervention Key Finding Verdict
CHOIR
2006
1,432 CKD ND (eGFR 15–50) Epoetin: Hb 13.5 vs. 11.3 g/dL High target → ↑ composite CV events (death, MI, CHF, stroke); HR 1.34 Harm — high target
TREAT
2009
4,038 CKD ND + T2DM Darbepoetin: Hb 13 vs. ≤9 g/dL (rescue transfusion) No CV benefit; ↑ fatal/non-fatal stroke 2× (RR 1.92); fatigue improved modestly Harm — stroke
CREATE
2006
603 CKD G3–G5 ND Epoetin: Hb 13–15 vs. 10.5–11.5 g/dL No benefit for primary composite; earlier ESRD in high-Hb group (borderline) Neutral
PIVOTAL
2019
2,141 HD patients IV iron sucrose: high-dose (400 mg/month) vs. low-dose reactive High-dose iron → ↓ CV events, ↓ ESA dose, no ↑ infections or hospitalization Benefit — proactive iron
ASCEND-D
2021
2,964 Dialysis CKD Daprodustat vs. darbepoetin Non-inferior for Hb maintenance; MACE similar in dialysis patients Non-inferior (dialysis)
PRO2TECT
2021
3,872 Non-dialysis CKD Daprodustat vs. darbepoetin Non-inferior for Hb; MACE non-inferiority margin not met (HR upper CI >1.25) Concern — ND-CKD
ASCEND-ND
2021
4,270 Non-dialysis CKD Roxadustat vs. placebo or darbepoetin Hb improvement; MACE non-inferiority not met vs. active comparator; FDA rejection 2021 Concern — ND-CKD

Guidelines Reference

KDIGO 2024 Anemia in CKD

  • Hb target 100–115 g/L (HD, PD, CKD ND)
  • Do not intentionally target >130 g/L
  • Treat iron deficiency before initiating ESA
  • TSAT ≥30% + ferritin 200–800 in HD; TSAT ≥20% + ferritin ≥100 in ND/PD
  • Use lowest effective ESA dose (minimize ERI)
  • HIF-PHI: alternative in dialysis patients; caution in non-dialysis CKD

NKF KDOQI 2012 Update

  • ESA initiation: Hb <100 g/L after correcting iron and other reversible causes
  • Avoid Hb >115 g/L on ESA
  • Iron therapy: preferred first-line before ESA in CKD patients with TSAT <20%
  • Routine use of ESA in active malignancy: not recommended
  • Screen for and correct B12/folate before escalating ESA

Future Directions

Future of CKD Anemia Management — AI-guided dosing, hepcidin-targeted therapies, precision medicine biomarkers, advanced dialysis analytics, next-generation oral therapies

AI-Guided ESA & Iron Dosing

Machine learning models are being validated for predicting Hb response to ESA dose changes and optimal IV iron dosing intervals. Early data show 15–20% reduction in Hb variability vs. protocol-based dosing in HD cohorts. Clinical deployment in Philippine HD centers is emerging, with pilot programs in select networks.

Hepcidin-Targeted Therapies

Hepcidin is the central driver of functional iron deficiency in CKD. Novel approaches in Phase II trials: anti-hepcidin monoclonal antibodies (lexaptepid), TMPRSS6 activators to suppress hepcidin synthesis, and ferroportin stabilizers. These could fundamentally change management of high-ferritin functional-IDA patients resistant to conventional IV iron.

Precision Iron Phenotyping

Emerging biomarkers beyond TSAT/ferritin: reticulocyte Hb content (CHr/RetHe), soluble transferrin receptor (sTfR), sTfR/log ferritin index, hepcidin-25 levels, zinc protoporphyrin. Multi-marker panels may allow precision iron subtype classification (absolute IDA vs. functional IDA vs. iron-restricted erythropoiesis vs. iron overload) and guide individualized therapy.

Next-Generation ESA & Alternatives

Pipeline agents: (1) activin receptor ligand traps (sotatercept — approved for PAH, under study in CKD anemia) that stimulate late-stage erythropoiesis via TGF-β superfamily inhibition; (2) siRNA therapies targeting liver hepcidin production; (3) EPO receptor agonists with non-EPO structure (no PRCA risk). These may address refractory anemia and ESA hyporesponsiveness where current therapies fail.