Xanax (alprazolam) is a fast-acting, prescription benzodiazepine used to treat generalized anxiety disorder (GAD), anxiety associated with depression, and panic disorder with or without agoraphobia. It works by slowing down the central nervous system, commonly causing drowsiness and dizziness, and carries high risks of dependence, addiction, and severe interaction with alcohol or opioids. 
Key Details About Xanax (Alprazolam)
Uses: Approved for short-term relief of anxiety symptoms and panic disorders.
Common Side Effects: Sedation, dizziness, lightheadedness, impaired coordination, and difficulty concentrating.
Withdrawal Symptoms: Stopping abruptly can cause severe withdrawal, including seizures, tremors, insomnia, abdominal pain, and anxiety.
Drug Interactions: Dangerous interactions occur with opioids (risk of extreme sedation, respiratory depression, and death), alcohol, and other CNS depressants.
Brand Names & Forms: The primary brand is Xanax, with generic alprazolam available in tablets, extended-release tablets, and oral solutions.
Dosage: Generally starts at 0.25 mg to 0.5 mg three times daily for anxiety, to a maximum of 4 mg per day for panic disorder.