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Effexor Side Effects

Bipolar Medications Library


Updated June 08, 2012

List of Effexor side effects. Effexor - generic name venlafaxine - is an SNRI antidepressant sometimes prescribed for use in the treatment of bipolar disorder and other mental illnesses. People taking Effexor should be aware of the potential side effects of this drug.

Common Effexor Side Effects:

Check with your doctor if any of the following side effects continue or are bothersome:

Abnormal dreams; anxiety or nervousness; chills; constipation; diarrhea; dizziness; drowsiness; dryness of mouth; heartburn; increased sweating; loss of appetite; nausea; stuffy or runny nose; stomach pain or gas; tingling, burning, or prickly sensations; trembling or shaking; trouble in sleeping; unusual tiredness or weakness; vomiting; weight loss

Less Common Effexor Side Effects:

Check with your doctor if any of the following side effects continue or are bothersome:

Change in sense of taste; muscle tension; yawning

Always notify your doctor if you experience any of these Effexor side effects:

More Common: Changes in vision, such as blurred vision; decrease in sexual desire or ability; headache

Less Common: Chest pain; feeling of fast or irregular heartbeat; mood or mental changes; ringing or buzzing in ears

Rare: Convulsions (seizures); itching or skin rash; lightheadedness or fainting, especially when getting up suddenly from a sitting or lying position; lockjaw; menstrual changes; problems in urinating or in holding urine; swelling; talking, feeling, and acting with excitement and activity you cannot control; trouble in breathing

Effexor may also cause the following side effect that your doctor will watch for:

More Common: High blood pressure

Effexor Withdrawal Side Effects - Notify Doctor:

Changes in dreaming; dizziness; dryness of mouth; headache; increased sweating; nausea; nervousness; trouble in sleeping; unusual tiredness or weakness

Effexor Overdose Effects - Notify Doctor Immediately:

Agitation; convulsions (seizures); drowsiness; extreme tiredness or weakness; fast heartbeat; tingling, burning, or prickling sensations; trembling or shaking

Other side effects not listed above may also occur in some patients. If you notice any other Effexor side effects, check with your doctor.

Disclaimer: This is not intended to be all-inclusive or to replace information provided by your doctor or with the prescription from the manufacturer.

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