If you also receive chemotherapy or bone marrow transplant: Do not use filgrastim within 24 hours before or 24 hours after you receive chemotherapy, or within 24 hours after a bone marrow transplant.
Other drugs may affect filgrastim, including prescription and over-the-counter medicines, vitamins, and herbal products. Tell your doctor about all your current medicines and any medicine you start or stop using.
 Filgrastim drug interactions (more detail)
