Xanax Common and Rare Side Effects

Common side effects of Xanax include dizziness, dry mouth, drowsiness, headache and slurred speech. This page lists Xanax side effects that are common, less common and rare, as well as withdrawal and overdose effects. If you or someone you love is taking Xanax or alprazolam (the generic version), you should be aware of the potential side effects, as well as the effects of overdose and discontinuation.

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

More Common: Dry mouth; sleepiness; drowsiness; clumsiness or unsteadiness; dizziness or light-headedness; speech disturbances.

Less Common or Rare: Gastrointestinal disturbances; blurred vision or other changes in vision; changes in sexual desire or ability; a headache; increased saliva; muscle spasm; problems urinating; trembling or shaking; unusual tiredness or weakness; weight changes.

Less Common: Anxiety; confusion (may be more common in the elderly); fast, pounding or irregular heartbeat; memory disturbances.

Rare: Abnormal thinking, disorientation, delusions or agitation; behavior changes, including aggressive behavior, bizarre behavior, decreased inhibition or outbursts of anger; convulsions (seizures); hallucinations ; hypotension (low blood pressure); muscle weakness; skin rash or itching; sore throat, fever and chills; ulcers or sores in mouth or throat; uncontrolled movements of body, including the eyes; unusual bleeding or bruising; unusual excitement, nervousness or irritability; unusual tiredness or weakness (severe); yellow eyes or skin.

Note: Xanax dependence may occur within a relatively short period of time, especially at higher dosages. For this reason, Xanax should be tapered off. There is a higher risk of withdrawal effects if the drug is stopped abruptly.

More common: Irritability; nervousness; insomnia; anxiety; light-headedness; a headache; fatigue; nausea or vomiting; weight loss; decreased appetite; sweating; unusual involuntary movement.

Less common: Abdominal cramps, nausea or vomiting; fast or pounding heartbeat; increased physical sensitivities; increased sweating; delusions, hallucination, cognitive disturbances, muscle cramps or abnormal movements.

Rare (notify the doctor immediately): Confusion of time, place or person; convulsions (seizures); feelings of suspicion or distrust; hallucinations.

Confusion (continuing); convulsions (seizures); drowsiness (severe) or coma; shakiness; abnormal heartbeat; slow reflexes; slurred speech (continuing); staggering; troubled breathing; weakness (severe).

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