Xanax (alprazolam) and diazepam are benzodiazepines used to treat anxiety and panic disorders, but they differ in speed and duration of action. Xanax works quickly and is often preferred for sudden panic symptoms, but it has a shorter duration and a higher risk of dependence. Diazepam acts more slowly but lasts longer in the body, making it suitable for generalized anxiety, muscle spasms, and withdrawal management. Neither medication is universally “better”; effectiveness depends on individual symptoms, medical history, and doctor guidance. Both carry risks of sedation, dependence, and withdrawal, so they should be used only under professional supervision.