Ambien (zolpidem) and Xanax (alprazolam) are both central nervous system depressants but used for different purposes. Ambien is a sedative-hypnotic prescribed for insomnia, helping people fall or stay asleep. Xanax is a benzodiazepine used to treat anxiety and panic disorders. Ambien acts mainly on sleep-related receptors, while Xanax reduces anxiety by enhancing GABA activity. Common Ambien side effects include dizziness, daytime drowsiness, and sleepwalking. Xanax can cause sedation, memory problems, and dependence. Both carry risks of addiction, withdrawal, and impaired coordination, especially when combined with alcohol or other sedatives, and should be used under medical supervision.