XANAX 0.5MG TABAlprazolam 0. 5mg tablets exert their therapeutic effects primarily through their interaction with the gamma aminobutyric acid (GABA) receptors in the brain. This medication belongs to the benzodiazepine class of drugs, and it enhances the inhibitory effects of GABA, a neurotransmitter that reduces the excitability of neurons. By binding to specific sites on the GABA A receptor complex, alprazolam increases the frequency of chloride channel opening,