Common Side Effects and Potential Risks of Effexor

Effexor, or venlafaxine, commonly causes nausea, especially at the start of treatment. Gradually increasing your dose helps minimize this. Headache is another frequent side effect, often resolving within a few weeks.

Dizziness and sleepiness are also reported. Drive cautiously until you know how Effexor affects you. Constipation can occur; increase fiber and water intake to mitigate this. Changes in appetite, either increased or decreased, are possible.

Serious, though less common, side effects include: increased blood pressure, which your doctor will monitor; serotonin syndrome, characterized by high fever, confusion, and muscle rigidity – seek immediate medical attention if you experience these symptoms; and withdrawal symptoms upon discontinuation, which your doctor can help manage with a gradual tapering of the dose. Always follow your doctor’s instructions regarding dosage and discontinuation.

Remember: This information is not a substitute for professional medical advice. Discuss any concerns or side effects with your prescribing physician.