Xanax 1 mg is mainly used for anxiety, panic disorder, depression, panic attacks. Xanax starts working within five minutes & effects are noticeable within an hour. People who have these diseases can get relief after an hour & feel the calmness in the brain, body, behavior. It is available in 0.25 mg, 0.5 mg, 1 mg, 2 mg. The dose (0.5 mg, 1 mg) can be taken once in the morning. 10 mg is the maximum dose that you can take per day.