Desvenlafaxine and Doxepin interaction
Desvenlafaxine and Doxepin: the Desvenlafaxine prescribing label flag this combination with the strongest language, such as a contraindication, a boxed warning, or an instruction to avoid it.
Do not combine without a prescriber's guidance. The label language below is the strongest FDA uses.
What the FDA labels say
From the Desvenlafaxine (Pristiq Extended-Release) label · effective 2026-04-28
• Serotonin Syndrome: Increased risk when co-administered with other serotonergic agents, but also when taken alone.
If concomitant use of PRISTIQ with other serotonergic drugs is clinically warranted, inform patients of the increased risk for serotonin syndrome and monitor for symptoms.
Examples selegiline, tranylcypromine, isocarboxazid, phenelzine, linezolid, methylene blue Other Serotonergic Drugs Clinical Impact Concomitant use of PRISTIQ with other serotonergic drugs increases the risk of serotonin syndrome.
Intervention Monitor for symptoms of serotonin syndrome when PRISTIQ is used concomitantly with other drugs that may affect the serotonergic neurotransmitter systems.
If serotonin syndrome occurs, consider discontinuation of PRISTIQ and/or concomitant serotonergic drugs [see Warnings and Precautions (5.2) ].
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Open in the checkerNot medical advice. Interaction Checker quotes FDA label text and NIH fact sheets. Whether an interaction matters for you depends on doses, timing, kidney and liver function, and other conditions. Confirm with a pharmacist or prescriber.