Not Medical Advice: A yellow, rectangular-shape Xanax bar that is divided into 4 squares and has R 039 imprint has been identified as Alprazolam 2 mg.
Alprazolam belongs to a drug class called benzodiazepines. It works by slowing down the movement of chemicals in the brain that may become unbalanced and is used to treat anxiety, depression, panic disorder, tinnitus and dysautonomia.
In medical news, a psychologist reports an increase in recommending non-pharmaceutical treatments for mild to moderate anxiety, including traditional herbal remedies such as valerian root, that have been used to treat anxiety for generations. Learn more [here](http://www.prnewswire.com/news-releases/natural-treatments-for-anxiety-are-an-effective-alternative-to-drugs-says-psychologist-234218901.html