The imprint R039 on a yellow, rectangular pill identifies it as a generic 2 mg Alprazolam tablet, manufactured by Actavis Pharma (now part of Teva) Alprazolam is a potent prescription medication belonging to the benzodiazepine class. In street or pop culture, this specific pill is frequently referred to as a "yellow school bus" or a "yellow Xanax bar" due to its color and shape Key Specifications & Identification
• Active Ingredient: Alprazolam (2 mg)
• Color: Yellow
• Shape: Rectangular "bar" with three scores (grooves), allowing it to be easily broken into four smaller 0.5 mg segments.
• Imprint: "R 0 3 9" stamped across one side It works by binding to GABA receptors in the central nervous system, slowing down brain activity to create a rapid calming and sedative effect Dependency & Misuse: Alprazolam has a exceptionally high risk for physical and psychological dependence. It is classified as a Schedule IV controlled substance Life-Threatening Interactions: Combining this medication with alcohol, opioids, or other central nervous system depressants can cause severe respiratory depression, coma, or death Seizure Risk during Withdrawal: You should never stop taking this medication abruptly. Sudden discontinuation can trigger severe, life-threatening withdrawal symptoms, including grand mal seizures. Any dose reduction must be managed via a medical taper under a doctor's supervision The black market is heavily saturated with counterfeit "yellow bars". Fake R039 pills are regularly found to be laced with lethal doses of fentanyl or alternative, unregulated synthetic benzodiazepines