Prescription
Colony-Stimulating Factor (White Blood Cell Booster)
Filgrastim
Last reviewed April 2026
Who is this for?
What is this drug?
Filgrastim is an injection that helps your body make more white blood cells, which are the cells that fight infections. It works by stimulating your bone marrow (where blood cells are made) to produce more of these infection-fighting cells.
What is it used for?
Low white blood cell count after chemotherapy (cancer treatment)helping the body recover after bone marrow transplantsevere long-term low white blood cell conditionsboosting white blood cells in HIV/AIDS patients
Prescription Required
A doctor's prescription is required to obtain this drug legally.