Alprazolam, an active ingredient of Xanax, represses the activity of the central nervous system, decreases nervous agitation, and has a general calming effect. The nervous anxiety reduces by increasing the effect of a natural compound of gamma-aminobutyric acid (GABA), which suppress the excitation of neurons and weakens the transmission of signals through the nerves. Xanax helps you to fall asleep faster, increases the duration of sleep, and reduces the number of night awakenings.