Xanax contains alprazolam, which belongs to the benzodiazepines class. It is commonly prescribed to treat anxiety disorders, panic disorders, and, in some cases, short-term relief of anxiety symptoms. Xanax works by amplifying the effects of a neurotransmitter called gamma-aminobutyric acid (GABA) in the brain. GABA helps by providing some calming effects such as: Calming and Sedative: Helps relieve tension, worry, or fear. Muscle Relaxation: May reduce muscle tension associated with anxiety. Sleep Induction: Often causes drowsiness, making it helpful for insomnia associated with anxiety.