A tablet debossed with R 0 3 9 is the Yellow Xanax bar. Available as rectangle shape and identified as Alprazolam 2 mg and supplied by Actavis.

It is used in the treatment of anxiety disorder, panic disorder, and depression. It belongs to the class of drugs called benzodiazepines. This medication is not prescribed to use during the pregnancy period. Yellow Xanax bar is classified as a Schedule IV-controlled substance under the controlled substance act.
Imprint: R 0 3 9
Strength: 2 mg
Shape and size: Rectangle, 15.00 mm
Availability: prescription only
Drug Class: Benzodiazepines (known for calming effects)

This type of Alprazolam tablet is the generic form of the drug and sometimes has the number R 039 on it. The strength of this generic form of Alprazolam is 2 mg, such as white Xanax bars. Yellow Xanax bars are available as a combination of four dosages of 0.5 mg strength. These bars are worked the same as the white Xanax bar. The street name for this type of Alprazolam is the Yellow school bus on account of the shape and color. The 2mg yellow Xanax bars are typically cost $4.00 each on the street and are considered stronger than the green or white Xanax bars.