Does Desvenlafaxine Interact With Venlafaxine?

with a single dose of venlafaxine 50 mg in extensive metabolizers (EM; n = 14) and 25 mg in poor metabolizers (PM; n = 6) of CYP2D6 resulted in higher plasma concentrations of both venlafaxine and O-desvenlafaxine (ODV) in most subjects following administration of ketoconazole.

Severity: Minor

Severity basis: drug interactions section. Combining Desvenlafaxine (SNRI 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

with a single dose of venlafaxine 50 mg in extensive metabolizers (EM; n = 14) and 25 mg in poor metabolizers (PM; n = 6) of CYP2D6 resulted in higher plasma concentrations of both venlafaxine and O-desvenlafaxine (ODV) in most subjects following administration of ketoconazole.

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

Desvenlafaxine

SNRI antidepressant

Brands: Pristiq

View Desvenlafaxine 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 It may be incomplete or out of date, and individual circumstances vary.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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