Xanax (alprazolam) is a benzodiazepine medication used to treat anxiety and panic disorders. It works by enhancing GABA, a neurotransmitter that promotes relaxation in the brain, providing rapid relief from anxiety symptoms. Typical doses range from 0.25 mg to 2 mg, taken as needed or regularly, depending on the condition. Common side effects include drowsiness, dizziness, and fatigue.