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U.S. Department of Health and Human Services

Safety

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Effexor (Venlafaxine Hydrochloride) Tablets and Effexor XR (Venlafaxine Hydrochloride) Extended-Release Capsules

Detailed View: Safety Labeling Changes Approved By FDA Center for Drug Evaluation and Research (CDER) – December 2012

Summary View

 

(Serotonin Toxicity associated with co-administration with Linezolid and Methylene Blue)

 

CONTRAINDICATIONS

  • Starting Effexor and Effexor XR in a patient who is being treated with MAOIs such as linezolid or intravenous methylene blue is also contraindicated because of an increased risk of serotonin syndrome.
 

WARNINGS

Serotonin Syndrome
  • The development of a potentially life-threatening serotonin syndrome has been reported with SNRIs and SSRIs, including Effexor and Effexor XR, alone but particularly with concomitant use of other serotonergic drugs (including triptans, tricyclic antidepressants, fentanyl, lithium, tramadol, tryptophan, buspirone, and St. John's Wort) and with drugs that impair metabolism of serotonin (in particular, MAOIs, both those intended to treat psychiatric disorders and also others, such as linezolid and intravenous methylene blue)…
 

MEDICATION GUIDE

  • take a Monoamine Oxidase Inhibitor (MAOI). Ask your healthcare provider or pharmacist if you are not sure if you take an MAOI, including the antibiotic linezolid…

 

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