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.
