Does Valproic Acid Interact with Mefloquine Hydrochloride?
Valproic Acid and Mefloquine Hydrochloride have a moderate drug interaction according to U.S. FDA drug labeling data. Mefloquine may reduce seizure control by lowering plasma levels of anticonvulsant. Monitor blood levels and adjust dosage appropriately. The mechanism involves reduced anticonvulsant 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
- Valproic Acid Class
- Anti-epileptic Agent
- Management
- Monitor for effects
- Data Source
- U.S. FDA via OpenFDA
How This Interaction Works
The interaction between Valproic Acid and Mefloquine Hydrochloride occurs because reduced anticonvulsant plasma levels. Clinically, this means mefloquine may reduce seizure control by lowering plasma levels of anticonvulsant. monitor blood levels and adjust dosage appropriately. 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 Valproic Acid and your doctor is considering prescribing Mefloquine Hydrochloride (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