Xanax is the brand name for Alprazolam, a high-potency drug used to treat anxiety and panic symptoms. Xanax is a popular and widely used anti-anxiety medication. Because of its high market demand, Xanax is available in a variety of forms and strengths in the United States. The yellow bar represents one of the various dosages of Alprazolam sold under the brand name Xanax. Like a Xanax bar, you can Buy Yellow Xanax Bar Online at our online pharmacy at discount prices. To purchase them from our website, you do not need a prescription. Yellow Xanax is an R 039 imprinted pill that has been identified as Alprazolam 2 mg. Actavis manufactures it in yellow color. It is also known as a generic medication.