Xanax is a high-potency fast-acting anti-anxiety oral therapy prescription that helps to treat anxiety disorder, panic disorder, and phobia with or without agoraphobia. It belongs to the group of drugs called benzodiazepines. It works by enhancing the activity of GABA levels in the brain and the activity of neurotransmitters to produce a calming and relaxing effect and reduce hyperactivity and anxiety symptoms. Xanax is the brand name of this drug, and it is also available under the generic version of Alprazolam. Buy Xanax 1mg Online. When you use this drug, it starts its effect within 20 to 30 minutes and lasts in the body for upto 6 to 8 hours.