Roxadustat vs Darbepoetin Alfa
Head-to-head comparison of Roxadustat (Roxadustat (FG-4592), hypoxia-inducible factor prolyl hydroxylase inhibitor) and Darbepoetin Alfa (Darbepoetin alfa, recombinant human erythropoiesis-stimulating protein) — benefits, dosing, side effects, research data, and where to buy.
Research Score
| Property | Roxadustat | Darbepoetin Alfa |
|---|---|---|
| Category | Muscle & Performance | Muscle & Performance |
| Full Name | Roxadustat (FG-4592), hypoxia-inducible factor prolyl hydroxylase inhibitor | Darbepoetin alfa, recombinant human erythropoiesis-stimulating protein |
| Molecular Weight | 352.35 Da | ≈37,000 Da |
| Half-Life | ~12-16 h | ~21 h IV; ~49 h SC |
| Amino Acids | N/A | 165 |
| Typical Dose | 70-100 mg orally three times weekly | 0.45 mcg/kg weekly SC or 0.75 mcg/kg every 2 weeks |
| Route | Oral | Subcutaneous/IV |
| Purity | ≥98% | ≥98% |
| Studies Count | 180 | 210 |
| Research Status | Clinical | Clinical |
Roxadustat Benefits
- ✓induces endogenous EPO
- ✓improves iron handling
- ✓raises hemoglobin
- ✓may improve exercise tolerance
Darbepoetin Alfa Benefits
- ✓longer-acting erythropoiesis
- ✓stable hemoglobin
- ✓increased oxygen delivery
- ✓may improve aerobic capacity
Roxadustat Dosing
70-100 mg orally 3x weekly|Titrate by hemoglobin response|Monitor iron indices regularly
Darbepoetin Alfa Dosing
0.45 mcg/kg weekly SC|0.75 mcg/kg every 2 weeks SC|Dose-adjust to hemoglobin response
Roxadustat Side Effects
- ⚠nausea
- ⚠hypertension
- ⚠thrombotic events
Darbepoetin Alfa Side Effects
- ⚠hypertension
- ⚠thromboembolism
- ⚠headache
Research Overview
Roxadustat
Large clinical studies support roxadustat for anemia, especially in chronic kidney disease populations. Direct VO2 max enhancement data in healthy athletes are limited, so its performance effects remain mostly inferential.
Darbepoetin Alfa
Clinical studies show durable hemoglobin correction with less frequent dosing than epoetin alfa. The endurance benefit, where present, would come from improved oxygen-carrying capacity rather than a direct ergogenic pathway.
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