Read some more, it is used for other purposed also.

Xanax is in a group of drugs called benzodiazepines (ben-zoe-dye-AZE-eh-peens). It affects chemicals in the brain that may become unbalanced and cause anxiety.

Xanax is used to treat anxiety disorders, panic disorders, and anxiety caused by depression.

Xanax may also be used for other purposes not listed in this medication guide.

Did you read the last part?