Yellow Xanax bar is a variety of generic Xanax, and sometimes it has r039 printed on it. Xanax is a popular medicine to treat specific mental healths. What is Yellow Xanax? Yellow Xanax sedative that quiets the nerves of the mind and causes you to feel mollusk. It diminishes the indications of uneasiness and frenzy problem. What is the utilization of Yellow Xanax? The conventional type of Yellow Xanax is known with its nonexclusive name Alprazolam. Henceforth, it has a place with the family Benzodiazepines. In any case, this prescription is suggested by specialists for the correct treatment of tension, alarm problem and melancholy.