Xanax is a benzodiazepine medication that is indicated for the prevention and management of anxiety and panic disorders. It is a fast-acting drug of medium propensity that help manage a host of conditions. It is thought to work in the brain, enhancing the activity of GABA(a), a chemical neurotransmitter in the brain. Now Buy Xanax Online. It treats panic disorders and may cause panic, helplessness, and agoraphobia. In addition, it is also used to treat nausea due to chemotherapy.