Alprazolam is a benzodiazepine medication that is used to treat anxiety disorders, panic disorders, and anxiety associated with depression. It works by enhancing the effects of a neurotransmitter called gamma-aminobutyric acid (GABA) in the brain, which has a calming effect on the nerves. Alprazolam is a controlled substance, meaning that it can only be obtained with a valid prescription from a licensed healthcare provider.