Fosaprepitant (fosaprepitant dimeglumine) — Uses, Dosage, Side Effects & Safety

Drug class: Antiemetic (Neurokinin-1 Receptor Antagonist)

Overview

Fosaprepitant is a prescription medication used to prevent nausea and vomiting caused by certain cancer chemotherapy treatments. It is typically given as part of a combination therapy with other antiemetics, such as corticosteroids and 5-HT3 antagonists, to provide more effective prevention of both acute and delayed chemotherapy-induced nausea and vomiting (CINV). Fosaprepitant works by blocking neurokinin-1 (NK1) receptors in the brain, which are involved in triggering the vomiting reflex. By inhibiting these receptors, fosaprepitant helps reduce the likelihood of feeling sick or vomiting after chemotherapy. Key points for patients: Fosaprepitant is given as an intravenous infusion, usually before chemotherapy. It is not used to treat nausea or vomiting that has already started, but rather to prevent it. Always follow your healthcare provider's instructions and report any unusual side effects or allergic reactions promptly.

Therapeutic uses

  • Prevention of acute and delayed nausea and vomiting associated with highly emetogenic cancer chemotherapy (HEC)
  • Prevention of acute and delayed nausea and vomiting associated with moderately emetogenic cancer chemotherapy (MEC)

Common side effects

  • Fatigue
  • Diarrhea
  • Constipation
  • Headache
  • Hiccups
  • Dizziness
  • Neutropenia

Frequently Asked Questions about Fosaprepitant

What is fosaprepitant used for?

Fosaprepitant is used to prevent nausea and vomiting caused by certain types of cancer chemotherapy. It is not used to treat nausea or vomiting that has already started.

How is fosaprepitant administered?

Fosaprepitant is given as an intravenous infusion by a healthcare professional, usually 30 minutes before chemotherapy begins.

Can I use fosaprepitant if I have liver disease?

Caution is advised in patients with liver disease. Dose adjustments may be necessary, and your doctor will monitor your liver function closely.

Are there any serious side effects I should watch for?

Yes. Serious side effects include severe allergic reactions, liver problems, and severe infusion site reactions. Seek immediate medical attention if you experience symptoms such as swelling, difficulty breathing, or yellowing of the skin or eyes.

Can I take fosaprepitant with other medications?

Fosaprepitant can interact with several medications, including warfarin and hormonal contraceptives. Always inform your healthcare provider about all medicines you are taking.

Is fosaprepitant safe during pregnancy or breastfeeding?

The safety of fosaprepitant in pregnancy and breastfeeding is not well established. Use only if clearly needed and prescribed by your doctor.

What should I do if I miss a dose?

Contact your healthcare provider immediately if you miss a scheduled dose. Do not attempt to administer the medication yourself.

Educational information only. Always consult a qualified healthcare professional before starting, stopping, or changing any medication.