Xanax enhances the activity of GABA (gamma-aminobutyric acid), a neurotransmitter that slows down brain signaling. By increasing GABA’s calming effect, Xanax reduces excessive neuronal firing, which eases anxiety, muscle tension, and panic symptoms.Once absorbed, Xanax Tablets quickly cross the blood–brain barrier, which is why its effects can be felt relatively fast compared to some other anxiety medications.