Xanax is used for treating anxiety and panic disorders as well as nausea due to chemotherapy. It may be prescribed for managing generalized anxiety disorder, social anxiety disorder, various phobias and some other anxiety disorders. Generally, it is considered to be a highly effective benzodiazepine. The medication acts pretty quickly in the body. The first effects from its use can be expected to appear within the first hour. All the effects after taking this medication typically last for at least 6 hours. http://www.xanaxusa.org/