Xanax is a commonly used drug that belongs to the class of Benzodiazepine. The purpose of this drug is to affect the chemicals of a human mind and stabilize the condition, which was disturbed. Most of the doctors prescribe for Xanax to treat - anxiety disorder, panic disorder, and depression. It is also said that, at times, depression can be a symptom of anxiety. Therefore, you need to take professional advice from a doctor before you buy Xanax online. As you know, it is illegal to purchase drugs without a prescription; it will be best to consult a doctor and then take the drug.