Does Ribavirin Interact with Stavudine?
Ribavirin and Stavudine have a moderate drug interaction according to U.S. FDA drug labeling data. Ribavirin may antagonize antiviral activity and inhibit phosphorylation, potentially decreasing antiretroviral activity. Use with caution despite no pharmacokinetic interaction observed in some studies. The mechanism involves inhibition of phosphorylation; potential antagonism of cell culture antiviral activity. Patients taking both medications should consult their healthcare provider before starting, stopping, or changing the dosage of either drug. This information is based on official FDA drug labeling sourced from OpenFDA and the NIH National Library of Medicine.
- Severity
- Moderate
- Ribavirin Class
- Nucleoside Analog Antiviral
- Management
- Monitor for effects
- Data Source
- U.S. FDA via OpenFDA
How This Interaction Works
The interaction between Ribavirin and Stavudine occurs because inhibition of phosphorylation; potential antagonism of cell culture antiviral activity. Clinically, this means ribavirin may antagonize antiviral activity and inhibit phosphorylation, potentially decreasing antiretroviral activity. use with caution despite no pharmacokinetic interaction observed in some studies. This is classified as a moderate interaction. While it may not require stopping either medication, your healthcare provider should be aware you are taking both so they can monitor for potential effects and adjust treatment if necessary.
What To Tell Your Doctor or Pharmacist
If you are taking Ribavirin and your doctor is considering prescribing Stavudine (or vice versa), make sure to:
- Inform your doctor and pharmacist of all current medications, including over-the-counter drugs and supplements
- Ask whether the benefits of combining these medications outweigh the risks for your specific situation
- Ask what symptoms to watch for that would indicate the interaction is causing problems
- Ask whether any dosage adjustments are needed
- Never stop or change either medication without first consulting your healthcare provider