Does Rifampin Interact with Brivaracetam Injection?
Rifampin and Brivaracetam Injection have a moderate drug interaction according to U.S. FDA drug labeling data. Rifampin decreases brivaracetam plasma concentrations through CYP2C19 induction, requiring up to 100% dosage increase of brivaracetam. The mechanism involves cyp2c19 induction. 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
- Rifampin Class
- Rifamycin Antibacterial
- Brivaracetam Injection Class
- Epoxide Hydrolase Inhibitors
- Management
- Monitor for effects
- Data Source
- U.S. FDA via OpenFDA
How This Interaction Works
The interaction between Rifampin and Brivaracetam Injection occurs because cyp2c19 induction. Clinically, this means rifampin decreases brivaracetam plasma concentrations through cyp2c19 induction, requiring up to 100% dosage increase of brivaracetam. 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 Rifampin and your doctor is considering prescribing Brivaracetam Injection (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