Xanax is a low-cost medication that is extremely effective in the treatment of anxiety, panic disorder, and anxiety caused by depression. It is a well-known medication that has a balancing effect on the chemicals in the brain and nerves that cause anxiety. White Xanax Bars is the brand name for Alprazolam, which can reduce nervousness and increase energy levels in patients who use it. Xanax belongs to the benzodiazepine class of drugs, which act on the central nervous system to produce a calming effect.