Buy Xanax is a category of drugs called benzodiazepines, which mainly work to depress the central nervous system. When people buy Xanax online in the U.S., different websites may sell it without a prescription to be taken for the treatment of various types of anxiety and panic disorder. When the drug starts functioning, it slows down the activities of the brain. Various doses are available in Xanax for the treatment of the severity of anxiety. Xanax 1 mg, Xanax 2 mg, and Xanax XR 3 mg are such doses to consume by the patient for the reduction of anxiety.