Xanax is a widely recognized and FDA-approved medication that is available for purchase online. This prescription drug is commonly used to treat anxiety disorders and panic attacks. Xanax belongs to a class of medications called benzodiazepines, which work by enhancing the effects of a neurotransmitter called gamma-aminobutyric acid (GABA) in the brain. By increasing GABA activity, Xanax helps to reduce feelings of anxiety and promote a sense of calmness.