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Drug Dosing Toolkit: Norvir

for Veterans and the Public

ritonavir (Norvir)

Type of Drug: Pharmacokinetic Enhancer; Protease Inhibitor

A pharmacokinetic enhancer "boosts" certain other drugs by increasing their levels in the body and slowing their elimination.

Norvir was originally developed as a protease inhibitor but is no longer used in that way. Instead, "low-dose" Norvir (usually 100 mg) is often used with each dose of certain other HIV medications to boost their levels.

100 mg tablet Norvir

  • Norvir 100 tablet

    ritonavir (Norvir) 100 mg

Notes on taking this medication

  • Used as a booster of other protease inhibitors or for elvitegravir; must be taken with one of these
  • Should take with food
  • Ritonavir interacts with many other drugs; persons using ritonavir with those drugs may need an adjustment to their dose of ritonavir or the other drugs; consult your medical provider

Possible side effects

  • Many side effects including nausea; vomiting; diarrhea; loss of appetite; stomach discomfort
  • Tingling and numbness around the mouth
  • Liver inflammation and increased liver enzyme levels
  • Elevations in cholesterol and triglycerides
  • Elevated blood sugar
  • Abnormal accumulation of body fat

See accompanying chart: Tips for Common Side Effects


Disclaimer: This information is not meant to substitute for advice from your medical provider or pharmacist. If you have any questions about your medication dosing, talk to your medical provider or pharmacist.