Alprazolam is one of the most commonly prescribed benzodiazepines and is available in both generic and brand-name forms. While it is not possible to buy Alprazolam online without a valid prescription, there are a number of online pharmacies that can offer fast shipping and guaranteed quality products. Alprazolam is a prescription medicine used to treat anxiety and panic disorders. It belongs to a class of medication known as benzodiazepines, which are used to treat a number of different conditions.