R039 YELLOW PILL – IDENTIFICATION, MECHANISM OF ACTION, DOSAGE, SIDE EFFECTS
That yellow, rectangular tablet is a maximum-strength 2 mg dose of alprazolam, which you almost certainly know by its primary brand name, Xanax. Because this specific pill has three distinct score lines allowing it to be easily snapped into 0.5 mg quarters, it is highly recognizable and frequently referred to in both medical and colloquial settings as a “Xanax bar” or a “yellow school bus.” It is a potent, prescription-only anxiolytic used to manage severe anxiety and panic disorders.