Alprazolam is a prescription medication that belongs to a class of drugs called benzodiazepines. It is most commonly prescribed to treat anxiety disorders and panic disorders. The 2 mg dose is considered a higher strength and is usually prescribed only when lower doses are not effective. What Is Alprazolam 2 mg Used For? Alprazolam works by enhancing the effects of a natural chemical in the brain called GABA (gamma-aminobutyric acid). GABA helps calm nerve activity, which reduces feelings of anxiety and panic.