Neukine 300 mcg is a brand of filgrastim, a granulocyte colony-stimulating factor (G-CSF). Unlike erythropoietin (which boosts red blood cells), Neukine stimulates the production of white blood cells (specifically neutrophils). It's especially important for patients undergoing chemotherapy or bone marrow suppression. Neukine helps restore immune defenses, reducing the risk of infections. Allows patients to continue chemotherapy on schedule by minimizing infection-related delays. Reduces hospitalizations due to fever or sepsis in immunocompromised patients.