Xanax, known as alprazolam, is a prescription medication used to treat Anxiety and Panic Disorders. It belongs to a group of medications called benzodiazepines, which functions by enhancing the effects of a neurotransmitter called (GABA) gamma-aminobutyric acid (GABA) in the brain. Buy Xanax Online GABA is an inhibitory neurotransmitter that helps regulate brain neuronal excitability. Benzodiazepines like Xanax binds to specific receptors on GABA neurons, which increases the activity of GABA in the brain. This increased activity reduces the activity of other neurotransmitters, such as dopamine and serotonin, which are involved in regulating mood and anxiety.