Xanax 0.5 pill is used to treat generalized anxiety disorder (GAD) in adults, the typical starting dosage of Xanax is 0.25 mg to 0.5 mg, which is taken three times per day. Your doctor may adjust your dose every 3 to 4 days until you're taking the dose that's right for you. This depends on how you respond to the starting dosage. The average dosage for panic disorder is 5 mg to 6 mg per day, split into three doses. However, some people may need up...