MAJOR — Use With Caution
FDA warning applies to SNRIs as well as SSRIs. Same monitoring recommendations.
Evidence level: STRONG
The FDA warns about combining sumatriptan (Imitrex) with Effexor (venlafaxine) because of serotonin syndrome risk. Both medications affect serotonin signaling in the brain.
Triptan + SNRI serotonin syndrome risk. FDA 2006 warning covers both SSRIs and SNRIs with triptans.
Know the symptoms of serotonin syndrome. Contact your doctor immediately if you experience agitation, high fever, or muscle problems after taking both medications together.
Take Venlafaxine at the same time each day — most people prefer morning with breakfast. Sumatriptan follows its prescribed schedule. SNRIs can affect blood pressure (both up and down), so monitor BP if combining with cardiovascular medications.
Higher risk for: elderly, those on multiple serotonergic drugs, people with liver impairment, CYP2D6 poor metabolizers, recent dose changes, or concurrent use of MAOIs or triptans.
Agitation, confusion, fast heartbeat, fever, muscle jerking, nausea, diarrhea, sweating
Same guidance as SSRI-triptan combination. Newer CGRP antagonists may avoid this concern. Many headache specialists prescribe both with patient education.
Discuss this combination with your prescriber. They may adjust timing, dosing, or switch to an alternative with fewer interaction risks. Never stop an antidepressant abruptly — taper under medical guidance.
The FDA warns about combining sumatriptan (Imitrex) with Effexor (venlafaxine) because of serotonin syndrome risk. Both medications affect serotonin signaling in the brain.
Take Venlafaxine at the same time each day — most people prefer morning with breakfast. Sumatriptan follows its prescribed schedule. SNRIs can affect blood pressure (both up and down), so monitor BP if combining with cardiovascular medications.
Agitation, confusion, fast heartbeat, fever, muscle jerking, nausea, diarrhea, sweating
Discuss this combination with your prescriber. They may adjust timing, dosing, or switch to an alternative with fewer interaction risks. Never stop an antidepressant abruptly — taper under medical guidance.
Same guidance as SSRI-triptan combination. Newer CGRP antagonists may avoid this concern. Many headache specialists prescribe both with patient education.
Or browse the full interaction database (121,000+ pairs).