Does Warfarin Interact with Tirzepatide?
Warfarin and Tirzepatide have a moderate drug interaction according to U.S. FDA drug labeling data. MOUNJARO delays gastric emptying and may impact absorption; monitor patients on narrow therapeutic index drugs. The mechanism involves delayed gastric emptying affecting oral medication absorption. 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
- Tirzepatide Class
- Glucose-dependent Insulinotropic Polypeptide Receptor Agonist
- Management
- Monitor for effects
- Data Source
- U.S. FDA via OpenFDA
How This Interaction Works
The interaction between Warfarin and Tirzepatide occurs because delayed gastric emptying affecting oral medication absorption. Clinically, this means mounjaro delays gastric emptying and may impact absorption; monitor patients on narrow therapeutic index drugs. 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 Warfarin and your doctor is considering prescribing Tirzepatide (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