Does Sofosbuvir Interact with St Johns Wort?
Sofosbuvir and St Johns Wort have a moderate drug interaction according to U.S. FDA drug labeling data. P-gp inducer that may decrease sofosbuvir plasma concentration, leading to reduced therapeutic effect. Concomitant use not recommended. The mechanism involves p-gp induction in intestine decreases sofosbuvir plasma concentration. 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
- Sofosbuvir Class
- Hepatitis C Virus Nucleotide Analog NS5B Polymerase Inhibitor
- Management
- Monitor for effects
- Data Source
- U.S. FDA via OpenFDA
How This Interaction Works
The interaction between Sofosbuvir and St Johns Wort occurs because p-gp induction in intestine decreases sofosbuvir plasma concentration. Clinically, this means p-gp inducer that may decrease sofosbuvir plasma concentration, leading to reduced therapeutic effect. concomitant use not recommended. 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 Sofosbuvir and your doctor is considering prescribing St Johns Wort (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