Does Letermovir Interact with Nafcillin?
Letermovir and Nafcillin have a unknown drug interaction according to U.S. FDA drug labeling data. Antibiotics nafcillin ↓ letermovir Co-administration of PREVYMIS and nafcillin is not recommended due to potential for loss of efficacy of PREVYMIS. 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
- Unknown
- Letermovir Class
- Cytomegalovirus DNA Terminase Complex Inhibitor
- Management
- Consult your pharmacist
- Data Source
- U.S. FDA via OpenFDA
What To Tell Your Doctor or Pharmacist
If you are taking Letermovir and your doctor is considering prescribing Nafcillin (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
- Never stop or change either medication without first consulting your healthcare provider