“What is Blue Xanax used to treat?” is a commonly asked question regarding this drug. There are two primary conditions for which this medication is prescribed. The use of Xanax include anxiety disorders, which can affect both adults and children. The second is panic disorders, which are associated with anxiety. When taken as prescribed, Xanax, brand name of Alprazolam, use can help stop episodes of intense, irrational fear or anxiety when they start to occur.