Does Ketoconazole Interact with Tezacaftor And Ivacaftor?
Ketoconazole and Tezacaftor And Ivacaftor have a moderate drug interaction according to U.S. FDA drug labeling data. 7 DRUG INTERACTIONS Potential for other drugs to affect tezacaftor/ivacaftor CYP3A inhibitors: Reduce SYMDEKO dosage when co-administered with strong (e.g., ketoconazole) or moderate (e.g., fluconazole) CYP3A inhibitors. Examples of strong CYP3A inhibitors include: ketoconazole, itraconazole, posaconazole, and voriconazole telithromycin and clarithromycin Co-administration of fluconazole increased ivacaftor exposure (AUC) by 3.0-fold. 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
- Ketoconazole Class
- Azole Antifungal
- Management
- Monitor for effects
- Data Source
- U.S. FDA via OpenFDA
What To Tell Your Doctor or Pharmacist
If you are taking Ketoconazole and your doctor is considering prescribing Tezacaftor And Ivacaftor (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