STOP — Contraindicated
FDA contraindication. Use alternative antibiotics. If linezolid is essential and life-threatening, discontinue venlafaxine with appropriate monitoring.
Evidence level: STRONG
Linezolid combined with Effexor (venlafaxine) can cause life-threatening serotonin syndrome. The FDA says these medications must not be used together.
Same MAO inhibitor + SNRI serotonin syndrome mechanism. FDA contraindicates linezolid with all serotonergic antidepressants.
Alert medical staff to your Effexor use before any antibiotic treatment. Venlafaxine has a shorter half-life than fluoxetine, so discontinuation is faster but may cause withdrawal symptoms.
Follow each medication's specific timing instructions. Linezolid — check if it requires an empty stomach or should be taken with food. Venlafaxine follows its normal schedule. Complete the full antibiotic course as prescribed.
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.
Severe agitation, high fever, muscle rigidity, rapid heartbeat, blood pressure instability, seizures
Use alternative antibiotics. If linezolid unavoidable, discontinue venlafaxine (taper if time permits). Monitor for both serotonin syndrome and SNRI withdrawal.
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.
Linezolid combined with Effexor (venlafaxine) can cause life-threatening serotonin syndrome. The FDA says these medications must not be used together.
Follow each medication's specific timing instructions. Linezolid — check if it requires an empty stomach or should be taken with food. Venlafaxine follows its normal schedule. Complete the full antibiotic course as prescribed.
Severe agitation, high fever, muscle rigidity, rapid heartbeat, blood pressure instability, seizures
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.
Use alternative antibiotics. If linezolid unavoidable, discontinue venlafaxine (taper if time permits). Monitor for both serotonin syndrome and SNRI withdrawal.
Or browse the full interaction database (121,000+ pairs).