Xanax 0.25mg Uses Alprazolam is used in the treatment of Anxiety and Panic disorder. How Xanax  works Xanax 0.25mg is a benzodiazepine. It works by increasing the action of a chemical messenger (GABA) which suppresses the abnormal and excessive activity of the nerve cells in the brain. Common side effects of Xanax Memory impairment, Sleepiness,…