Xanax (Alprazolam) is an oral prescription antianxiety medication that helps to prevent and control anxiety disorder, panic disorder, phobias, and other allied conditions. It belongs to the benzodiazepine group of medications that works by increasing the activity and functions of GABA and acts as a CNS depressant. GABA is an amino acid known as an inhibitory neurotransmitter that blocks the chemical messages in the brain and reduces the hyperactivity of the mind.