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In the US, Fosamprenavir (fosamprenavir systemic) is a member of the drug class protease inhibitors and is used to treat HIV Infection and Nonoccupational Exposure.

US matches:



ATC (Anatomical Therapeutic Chemical Classification)


CAS registry number (Chemical Abstracts Service)


Chemical Formula


Molecular Weight


Therapeutic Categories

Antiviral agent

Treatment of HIV infection

HIV protease inhibitor

Chemical Names

(3S)-tetrahydro-3-furyl [(α S)-α-[(1R)-1-hydroxy-2-(N¹-isobutylsulfanil=amido)etyl]phenetyl]carbamate, dihydrogen phosphate (ester) (WHO)

(S)-Tetrahydro-3-furyl{(αS)-α-[(R)-1-(dihydroxyphosphoryloxy)-2-(N-isobutylsulfanilamido) etyl]phenetyl}carbamat (IUPAC)

Foreign Names

  • Fosamprenavirum (Latin)
  • Fosamprenavir (German)
  • Fosamprénavir (French)
  • Fosamprenavir (Spanish)

Generic Names

  • fAPV (IS)
  • GW 433908 (IS: GlaxoSmithKline)
  • VX 175 (IS: Vertex)
  • Fosamprenavir Calcium (OS: USAN)
  • 908 (IS)
  • GW 433908G (IS)
  • VX-175 (IS)

Brand Names

  • Telzir
    GlaxoSmithKline, Romania; GlaxoSmithKline, Slovakia; GSK, Turkey
  • Lexiva
    GlaxoSmithKline, Israel; GlaxoSmithKline, United States; ViiV Healthcare, Japan; ViiV Healthcare, United States
  • Telzir
    Glaxo, Latvia; Glaxo Wellcome, Serbia; GlaxoSmithKline, Argentina; GlaxoSmithKline, Chile; GlaxoSmithKline, Colombia; GlaxoSmithKline, Denmark; GlaxoSmithKline, Finland; GlaxoSmithKline, Sweden; GlaxoSmithKline, South Africa; Haemato Pharm, Austria; ViiV, Australia; ViiV, Belgium; ViiV, Hungary; ViiV, Netherlands; ViiV Healthcare, Austria; ViiV Healthcare, Switzerland; ViiV Healthcare, Czech Republic; ViiV Healthcare, Germany; ViiV Healthcare, France; ViiV Healthcare, Greece; ViiV Healthcare, Ireland; ViiV Healthcare, Italy; ViiV Healthcare, Norway; ViiV Healthcare, Poland; Viiv Healthcare S.L., Spain; ViiV Healthcare UK, United Kingdom; ViiV Healthcare UK Limited, Iceland; ViiV Healthcare ULC, Canada; Viivhiv, Portugal; ViiV Healthcare, Lithuania


IUPACInternational Union of Pure and Applied Chemistry
ISInofficial Synonym
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.