Does Voriconazole Interact with Omeprazole?
Voriconazole and Omeprazole have a moderate drug interaction according to U.S. FDA drug labeling data. Voriconazole, a combined inhibitor of CYP2C19 and CYP3A4, may raise omeprazole levels. The mechanism involves inhibition of cyp2c19 and cyp3a4 enzymes reduces omeprazole metabolism. 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
- Voriconazole Class
- Azole Antifungal
- Omeprazole Class
- Proton Pump Inhibitor
- Management
- Monitor for effects
- Data Source
- U.S. FDA via OpenFDA
How This Interaction Works
The interaction between Voriconazole and Omeprazole occurs because inhibition of cyp2c19 and cyp3a4 enzymes reduces omeprazole metabolism. Clinically, this means voriconazole, a combined inhibitor of cyp2c19 and cyp3a4, may raise omeprazole levels. 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 Voriconazole and your doctor is considering prescribing Omeprazole (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