Enfuvirtide

FDA-approved HIV fusion inhibitorEstablished

FDA-approved HIV-1 fusion inhibitor (Fuzeon) for treatment-experienced patients. 90 mg subcutaneous twice daily with other antiretrovirals.

Calculate Dose

For research use only.

Key Facts

CAS
159519-65-0
Molecular Weight (MW)
4491.4 g/mol
Half-life
~3.8 hours (sc)
Unit
mcg
Administration Route
Subcutaneous
Frequency
Twice daily
Last updated
8/23/2026
Targets
HIV-1 gp41

Overview

FDA-approved HIV-1 fusion inhibitor (Fuzeon) for treatment-experienced patients. 90 mg subcutaneous twice daily with other antiretrovirals.

Protocol

Dosage Range
90 mg twice daily
Frequency
Twice daily
Cycle
Long-term use as part of antiretroviral regimen
Administration Route
Subcutaneous
Reconstitution Guide
Reconstitute 90 mg vial with 1.1 mL sterile water for injection

Science

Mechanism of Action

36-amino-acid peptide that binds gp41 HR1, blocking six-helix-bundle formation and HIV-1 fusion with the host cell membrane.

Targets

HIV-1 gp41

Studies

Benefits

Salvage HIV therapyNovel fusion-inhibitor class

Potential Side Effects

  • Injection-site reactions (very common)
  • Pneumonia signal
  • Hypersensitivity

References

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