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Medications and Drugs

Brand Names: Emend for Injection

Generic Name: fosaprepitant (Pronunciation: FOS a PREP i tan t)

What is fosaprepitant (Emend for Injection)?

Fosaprepitant blocks the actions of chemicals in the body that trigger nausea and vomiting.

Fosaprepitant is used together with other medications to prevent nausea and vomiting that may be caused by cancer chemotherapy.

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.

What are the possible side effects of fosaprepitant (Emend for Injection)?

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Tell your caregivers at once if you have any of these serious side effects:

  • feeling light-headed, fainting;
  • slow heart rate;
  • pale skin, easy bruising or bleeding; or
  • pain or burning when you urinate.

Less serious side effects may include:

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.

What is the most important information I should know about fosaprepitant (Emend for Injection)?

You should not receive fosaprepitant if you are taking cisapride (Propulsid) or pimozide (Orap). These drugs may cause life-threatening interactions when taken together with fosaprepitant.

Before you receive fosaprepitant, tell your doctor if you have liver disease. You may need a dose adjustment or special tests to safely use this medication.

Fosaprepitant can make birth control pills less effective, resulting in pregnancy. This effect can last for up to 28 days after your last dose of this medication. Talk to your doctor about the use of a non-hormonal back-up form of birth control (such as condoms, a diaphragm, or spermicides) during treatment with fosaprepitant, and for 1 month afterward.

There are many other medicines that can interact with fosaprepitant. Tell your doctor about all medications you use. This includes prescription, over-the-counter, vitamin, and herbal products. Do not start a new medication without telling your doctor. Do not start using a new medication without telling your doctor. Keep a list with you of all the medicines you use and show this list to any doctor or other healthcare provider who treats you.

Report Problems to the Food and Drug Administration

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

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