It is very important that your doctor check your progress at regular visits to make sure this medicine is working properly and to check for unwanted effects.
You should not receive this medicine if you are also using cisapride (Propulsid®) or pimozide (Orap®). Fosaprepitant may cause serious or life-threatening problems if used together with these medicines.
This medicine may cause serious allergic reactions. Tell your doctor or nurse right away if you have itching; hives; a rash; shortness of breath; trouble with breathing; trouble with swallowing; warmth or redness in your face, neck, arms, or upper chest; or any swelling of your hands, face, or mouth while you are receiving this medicine.
If you are also taking a blood thinner called warfarin (Coumadin®, Jantoven®), your doctor will need to check your blood after using this medicine.
Birth control pills may not work as well while you are using fosaprepitant. To keep from getting pregnant, use another form of birth control together with your pills during treatment and for one month after your last treatment. Other forms include condoms, diaphragms, and contraceptive foams or jellies.
Do not take other medicines unless they have been discussed with your doctor. This includes prescription or nonprescription (over-the-counter [OTC]) medicines and herbal or vitamin supplements.