Does Fluoxetine Interact With Venlafaxine?

These findings have been confirmed in a clinical drug interaction study comparing the effect of venlafaxine to that of fluoxetine on the CYP2D6-mediated metabolism of dextromethorphan to dextrorphan.

Severity: Minor

Severity basis: drug interactions section. Combining Fluoxetine (SSRI antidepressant) and Venlafaxine (SNRI antidepressant) is classified as a minor interaction.

What to Do

This is generally a minor interaction, but review it with your pharmacist to be sure it is safe for you.

From the FDA Label

These findings have been confirmed in a clinical drug interaction study comparing the effect of venlafaxine to that of fluoxetine on the CYP2D6-mediated metabolism of dextromethorphan to dextrorphan.

Source: FDA structured product labeling (set_id 017a84aa-0e1f-f560-e063-6294a90a9069).

Fluoxetine

SSRI antidepressant

Brands: Prozac, Sarafem

View Fluoxetine safety profile

Venlafaxine

SNRI antidepressant

Brands: Effexor

View Venlafaxine safety profile

Check these against your full medication list in our free Interaction Checker

This information is educational — not medical advice.

This page is provided for general educational purposes and summarizes publicly available data from sources such as the U.S. Food & Drug Administration. It is not a substitute for the judgment of a licensed clinician and should not be used to start, stop, or change any medication. It may be incomplete or out of date, and individual circumstances vary. Always talk with your prescriber or pharmacist about your specific medications and health conditions. If you think you may have a medical emergency, call 911.

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