This yellow color pill has an imprint of “R039” and often a dose of 2 mg. It is printed on the side and has three line breaks printed on the tablet.Xanax as sold the name of alprazolam and commonly belongs to the class of benzodiazepine. This is prescription medicine buy Xanax online to treat anti anxiety and depression. It encloses your brain hormone and increases the hormone growth of Gaba hormone. This hormone gives the brain a calming and cooling effect. The best thing about this medication is it suddenly starts working after you take it. Below are the details about this medication. Dose : 2 mg Color : Yellow Imprint : R039 Shape : Rectangle