Generic Name: fosaprepitant (FOS a PREP i tan t)
Brand Name: Emend for Injection
Medically reviewed on April 25, 2018
What is fosaprepitant?
Fosaprepitant blocks the actions of chemicals in the body that trigger nausea and vomiting.
Fosaprepitant is given ahead of time and will not treat nausea or vomiting that you already have.
Fosaprepitant may also be used for purposes not listed in this medication guide.
You should not use fosaprepitant if you also take pimozide. Using these drugs together can cause unwanted or dangerous effects.
Before taking this medicine
You should not be treated with fosaprepitant if you are allergic to it, or if you take another medicine called pimozide (Orap). Fosaprepitant can cause unwanted or dangerous effects when used with pimozide.
To make sure fosaprepitant is safe for you, tell your doctor if you have:
It is not known whether this medicine will harm an unborn baby. Tell your doctor if you are pregnant.
Fosaprepitant can make birth control pills less effective. Ask your doctor about using a non-hormonal birth control (condom, diaphragm with spermicide) to prevent pregnancy for at least 1 month after each dose of this medicine.
It may not be safe to breast-feed while using this medicine. Ask your doctor about any risk.
How is fosaprepitant given?
Fosaprepitant is given as an infusion into a vein. A healthcare provider will give you this injection.
The first dose of fosaprepitant is usually given before your chemotherapy treatment begins.
Fosaprepitant is not for long-term use.
What happens if I miss a dose?
Since fosaprepitant injection is given only once on the first day of your chemotherapy treatment, you are not likely to be on a dosing schedule.
What happens if I overdose?
Since this medicine is given by a healthcare professional in a medical setting, an overdose is unlikely to occur.
What should I avoid while receiving fosaprepitant?
Follow your doctor's instructions about any restrictions on food, beverages, or activity.
Fosaprepitant side effects
Get emergency medical help if you have signs of an allergic reaction: hives, rash, itching, skin sores or peeling; warmth or tingly feeling; fast or weak heartbeats, severe dizziness; trouble breathing or swallowing; swelling of your face, lips, tongue, or throat.
Call your doctor at once if you have:
pain, redness, swelling, or bruising where the medicine was injected;
a light-headed feeling, like you might pass out;
pain or burning when you urinate; or
low blood cell counts--fever, swollen gums, mouth sores, skin sores, cold or flu symptoms, pale skin, easy bruising, unusual bleeding.
Common side effects may include:
weakness, tired feeling;
low blood cell counts;
pain, numbness, or weakness in your arms or legs.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
See also: Side effects (in more detail)
What other drugs will affect fosaprepitant?
Sometimes it is not safe to use certain medications at the same time. Some drugs can affect your blood levels of other drugs you take, which may increase side effects or make the medications less effective.
Many drugs can affect fosaprepitant. This includes prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible interactions are listed here. Tell your doctor about all your current medicines and any medicine you start or stop using.
Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
Copyright 1996-2018 Cerner Multum, Inc. Version: 8.01.
More about fosaprepitant
- Fosaprepitant Side Effects
- During Pregnancy
- Dosage Information
- Drug Interactions
- Support Group
- En Español
- 1 Review
- Drug class: NK1 receptor antagonists
Other brands: Emend for Injection