Alprazolam is used to treat anxiety and panic disorders. It belongs to a class of medications called benzodiazepines which act on the brain and nerves (central nervous system) to produce a calming effect. It works by enhancing the effects of a certain natural chemical in the body (GABA). Take this medication by mouth as directed by your doctor. Dosage is based on your medical condition and response to treatment. Your dose may be gradually increased until the drug starts working well. Follow your doctor's instructions closely to reduce the risk of side effects.