Compare Viracept vs. Invirase

Head-to-head comparisons of medication uses, side effects, ratings, and more.

Viracept (Nelfinavir)

Invirase (saquinavir)

Prescription only
No information currently available
Works with other medicines to treat HIV infection.

Invirase (saquinavir) is not a first choice medicine for HIV because other medicines similar to Invirase (saquinavir) work better with fewer side effects and with less pills to take every day.

No information currently available
  • If you have trouble swallowing capsules, they can be opened and mixed with syrup or jam.
  • People ages 16 and older can use this medicine.
No information currently available
  • Have to take at least 4 pills to reach your daily dose, along with all the other medications you are taking for HIV treatment.
  • Invirase (saquinavir) interacts with many other medications. This interaction can be harmful.
  • Can raise your blood sugar and cholesterol levels.
  • If you have a history of heart problems, Invirase (saquinavir) can put you at risk for developing unusual heart rhythms.
  • Only use ritonavir to boost Invirase (saquinavir), not Tybost (cobicistat).
Used for
  • HIV infection
Dosage forms
  • Pill
  • Liquid
  • Pill
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Side effects
The Viracept (Nelfinavir) FDA package insert doesn’t have numbers about how common side effects are.
10possible side effects
  • Nausea
  • Diarrhea
  • Vomiting
  • Abdominal pain
  • Fatigue
  • Changes in fat distribution
  • Pneumonia
  • Diabetes or increased blood sugar
  • Fever
  • Bronchitis
See more detailed side effects
Risks and warnings
No information currently available
  • Heart rhythm problems

    Use with other QT or PR prolonging drugs

    ...and 2 more risk factors

  • Liver damage

    History of liver damage

    ...and 2 more risk factors

  • New or worsening diabetes

    Use of protease inhibitors

    ...and 1 more risk factors

  • Immune reconstitution syndrome


    ...and 3 more risk factors

See more detailed risks and warnings