Does Cyclosporine Interact with Metronidazole?
Cyclosporine and Metronidazole have a moderate drug interaction according to U.S. FDA drug labeling data. CYP3A4 substrate whose plasma levels may increase with concomitant metronidazole use. Monitor plasma concentrations. The mechanism involves increased cyp3a4 substrate plasma levels. 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
- Cyclosporine Class
- Calcineurin Inhibitor Immunosuppressant
- Metronidazole Class
- Nitroimidazole Antimicrobial
- Management
- Monitor for effects
- Data Source
- U.S. FDA via OpenFDA
How This Interaction Works
The interaction between Cyclosporine and Metronidazole occurs because increased cyp3a4 substrate plasma levels. Clinically, this means cyp3a4 substrate whose plasma levels may increase with concomitant metronidazole use. monitor plasma concentrations. 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 Cyclosporine and your doctor is considering prescribing Metronidazole (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