Hematopoietic Drugs
Hematopoietic drugs are medications that stimulate the production of blood cells in the body. They are used to treat conditions associated with abnormal blood cell production or deficiencies in specific types of blood cells.
Classification
- Iron Salts
- Ferrous sulfate, Ferrous fumarate, Ferrous succinate
- Vitamins
- Vitamin B12, Folic acid
- Hematopoietic Growth Factors
- Erythropoiesis-Stimulating Agents (ESAs): Erythropoietin
- Granulocyte Colony-Stimulating Factors (G-CSF): Filgrastim
- Thrombopoietin Receptor Agonists (TPO-RA): Romiplostim
Pharmacodynamics (Mechanism of Action)
- Iron Salts (Ferrous sulfate, Ferrous fumarate, Ferrous succinate)
- Provide ferrous ions (Fe²⁺), essential for hemoglobin synthesis.
- Increase red blood cell production.
- Vitamin B12 & Folic Acid
- Essential for DNA synthesis & cell division.
- Crucial for red blood cell maturation.
- Hematopoietic Growth Factors
- Erythropoietin: Stimulates bone marrow to produce red blood cells.
- Filgrastim: Enhances white blood cell (neutrophil) production.
- Romiplostim: Stimulates platelet production, reducing bleeding risk.
Side Effects
- Common Side Effects
- Iron Salts: Gastrointestinal discomfort, constipation, dark stools.
- Vitamin B12 & Folic Acid: Usually well-tolerated, but high doses may cause diarrhea or skin rash.
- Erythropoietin: Hypertension, headache, flu-like symptoms.
- Filgrastim: Bone pain, leukocytosis (high WBC count).
- Romiplostim: Increased risk of bleeding, thrombosis.
- Rare but Serious Side Effects
- Erythropoietin: Increased risk of blood clots & cardiovascular events.
- Filgrastim: Spleen enlargement or rupture.
- Romiplostim: Severe allergic reactions.