No difference, they are manufactured by two different manufacturing companies. However, please do check it with a pharmacist, take care, best wishes. Doctors give trusted answers on uses, effects, side-effects, and cautions: Dr. Law-Yone on 2mg xanax bars: Of these meds does require medical supervision and follow up to minimize bad side effects. Xanax 2mg Yellow Bar R039 is mostly used to treat anxiety disorders, panic disorders, and nausea due to chemotherapy. Alprazolam may also be indicated for the treatment of generalized anxiety disorder, as well as for the treatment of anxiety conditions with co-morbid depression. Green Xanax bar are similar to white and yellow Xanax bar when it comes to strength and typically contains 2mg of the drug. Green Xanax bar is available in rectangular, oval, triangular, and round shapes, usually in doses of 2mg to 3mg. Xanax Bars - Difference between White 2mg vs Yellow 2mg r039? Updated 4 days ago • 40 answers Alprazolam - are the green rectangle 2mg bars extended release? The strength of yellow Xanax bars is 2mg and they are similar in effect to the white colored ones. The street name for this kind of generic Xanax includes yellow school bus on account of the color and shape. Green Xanax bar are similar to white and yellow Xanax bar when it comes to strength and typically contains 2mg of the drug. Green Xanax bar is available in rectangular, oval, triangular, and round shapes, usually in doses of 2mg to 3mg. Description Xanax 2MG Bars, Alprazolam. Xanax 2MG Bars, Alprazolam Yellow Bar Online without prescription. They’re drugs that balance deranged chemicals and neurotransmitters in the brain. Recently I got these white xanax bars that were supposed to be the best. I barely got the feeling off 2. Just now I got yellow bars and I took 2 and I am pretty loopy. I barely got the feeling off 2. Just now I got yellow bars and I took 2 and I am pretty loopy.