Sargramostim
Releuko is a brand-name medication containing filgrastim, a granulocyte colony-stimulating factor (G-CSF). It works by stimulating the bone marrow to produce more neutrophils, a type of white blood cell that helps fight infections. This medication is used in patients with conditions that cause low white blood cell counts.
Releuko is a G-CSF medication used to treat low white blood cell counts by stimulating neutrophil production.
Key facts at a glance
- RxNorm
- 2595946
- Generic
- Releuko
- Class
- brand-name
- Brands
- —
- Availability
- rx
- Lactation
- unknown
- Routes
- —
- Forms
- —
- Regions
- US, EU, CN, JP
- Monitoring
- —
This page is for informational purposes only.
Do not use this information to diagnose yourself or to replace a physician's advice. Always consult a qualified healthcare provider before starting, stopping, or changing any medication. If you believe you are experiencing a medical emergency, call your local emergency number immediately.
Releuko is used to reduce the risk of infection in patients with neutropenia (low neutrophil counts), particularly those undergoing chemotherapy for cancer, those receiving bone marrow transplants, or those with severe chronic neutropenia.
Releuko contains filgrastim, which binds to G-CSF receptors on neutrophil precursor cells in the bone marrow, stimulating their proliferation and differentiation into mature neutrophils, thereby increasing white blood cell counts.
Releuko is administered by injection and should only be used under healthcare supervision. Common side effects may include bone pain, fever, and injection site reactions. Patients should be monitored for spleen enlargement and potential allergic reactions. This is a prescription-only medication.
Official drug label
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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 9, 2026. · Read our editorial policy