XANAX is the brand name for a generic medication known as ALPRAZOLAM. XANAX is a kind of opioid pain medication that is used for treating moderate to moderately severe kind of pain. A patient can now buy XANAX online from any of the online medical websites. XANAX's other use includes using it for relieving pain from back pain, sciatica, and postoperative pain following spine surgery. For most adults, the maximum safe dose is 400 mg per day of immediate-release tablets. It has been proved that XANAX hydrochloride can allow a significant reduction in the dose of NSAID without compromising the relief of pain.