What are the possible side effects of Effexor?

Effexor (venlafaxine), a prescription drug for depression, may cause a number of side effects. Nausea is the most common, but other side effects include:
  • feeling drowsy, weak, tired or dizzy
  • headaches
  • nightmares
  • gastric issues such as vomiting, stomach pain, constipation, diarrhea, heartburn and gas
  • change in your ability to taste
  • decreased appetite
  • uncontrollable shaking of a part of your body
  • sweating
  • frequent urination or difficulty urinating
  • ringing in the ears
  • changes in your sexual desire or sexual ability
Tell your doctor if you have any symptoms that bother you or won't go away. Call your doctor immediately if you develop more serious side effects, including a rash, hives, itching, difficulty breathing or swallowing, chest pain, a fast heartbeat, seizures, unusual bruising or bleeding, eye pain or changes in your vision, fever and problems with coordination.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.