- Xanax often causes individuals to feel drowsy or dizzy.
- Xanax may interfere with concentration and lead to forgetfulness.
- Xanax may interfere with normal sleep patterns.
- Xanax may cause muscle weakness, balance problems and speech slurring.
- Xanax may cause constipation, upset stomach or vomiting.
- Some individuals who take Xanax may experience serious side effects. If these effects are experienced, a doctor should be consulted immediately. Serious side effects include willingness to participate in risky behavior, self-injurious or suicidal thoughts, fainting, tremors and seizures.













