Does Metoprolol Succinate Er Interact with Paroxetine?
Metoprolol Succinate Er and Paroxetine have a moderate drug interaction according to U.S. FDA drug labeling data. Strong CYP2D6 inhibitor that doubles metoprolol concentrations and decreases cardioselectivity; close monitoring required. The mechanism involves cyp2d6 inhibition increases metoprolol plasma concentration. 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
- Management
- Monitor for effects
- Data Source
- U.S. FDA via OpenFDA
How This Interaction Works
The interaction between Metoprolol Succinate Er and Paroxetine occurs because cyp2d6 inhibition increases metoprolol plasma concentration. Clinically, this means strong cyp2d6 inhibitor that doubles metoprolol concentrations and decreases cardioselectivity; close monitoring required. 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 Metoprolol Succinate Er and your doctor is considering prescribing Paroxetine (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