Skip to Content


In the US, Fosaprepitant (fosaprepitant systemic) is a member of the drug class NK1 receptor antagonists and is used to treat Nausea/Vomiting, Chemotherapy Induced.

US matches:

UK matches:



CAS registry number (Chemical Abstracts Service)


Chemical Formula


Molecular Weight


Therapeutic Category

Antiemetic agent: Substance P/Neurokinin 1 receptor antagonist

Chemical Name

(3-{[(2R,3S)-2-{(1R)-1-[3,5-Bis(trifluorometyl)phenyl]etoxy}-3-(4-fluorophenyl)morpholin-4-yl]metyl}-5-oxo-4,5-dihydro-1H-1,2,4-triazol-1-yl)phosphonic acid (WHO)

Foreign Names

  • Fosaprepitantum (Latin)
  • Fosaprepitant (German)
  • Fosapr√©pitant (French)
  • Fosaprepitant (Spanish)

Generic Names

Brand Names

  • Emend
    Merckle, Georgia
  • Ivemend
    Merck Sharp & Dohme, Poland; Merck Sharp & Dohme, Slovenia
  • Emend
    Merck, Canada; Merck, United States; Merck Sharp & Dohme, Australia; Merck Sharp & Dohme, Israel; MSD, Guatemala; MSD, Panama
  • Emend IV
    Merck, Hong Kong; Merck Sharp & Dohme Pharmaceuticals, Russian Federation
  • Ivemend
    Merck Sharp & Dohme, Austria; Merck Sharp & Dohme, Spain; Merck Sharp & Dohme, Greece; Merck Sharp & Dohme, Croatia (Hrvatska); Merck Sharp & Dohme, Portugal; Merck Sharp & Dohme, Romania; Merck Sharp & Dohme, Serbia; Merck Sharp & Dohme, Slovakia; MSD, Switzerland; MSD, Finland; MSD, Ireland; MSD, Netherlands; MSD, Norway; MSD Belgium, Belgium
    Merck Sharp & Dohme, United Kingdom; MSD, Sweden; MSD Merck Sharp & Dohme, Germany
  • Proemend
    Ono Yakuhin, Japan


BANBritish Approved Name
BANMBritish Approved Name (Modified)
ISInofficial Synonym
JANJapanese Accepted Name
OSOfficial Synonym
Rec.INNRecommended International Nonproprietary Name (World Health Organization)
USANUnited States Adopted Name
WHOWorld Health Organization

Further information on drug naming conventions: International Nonproprietary Names.

Important Notice: The international database is in BETA release. This means it is still under development and may contain inaccuracies. It is not intended as a substitute for the expertise and judgement of your physician, pharmacist or other healthcare professional. It should not be construed to indicate that the use of any medication in any country is safe, appropriate or effective for you. Consult with your healthcare professional before taking any medication.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.