Alprazolam is a prescription medication primarily used to treat anxiety disorders, panic disorders, and anxiety associated with depression. It belongs to a class of drugs called benzodiazepines, which act on the central nervous system to produce a calming effect by enhancing the effects of a neurotransmitter called gamma-aminobutyric acid (GABA). <br> <br>Alprazolam is commonly sold under the brand name Xanax. It works relatively quickly, often providing relief within 30 minutes to an hour after ingestion, and its effects typically last for several hours.