What Is the R039 Yellow Xanax Bar?

Types of Xanax Bars by Color and Strength

Xanax bars are available in multiple colors, shapes, and dosages. While the yellow Xanax bar marked R039 is among the most recognizable, other variants also exist. These include green Xanax bars, white Xanax bars, and blue Xanax bars. Each color typically indicates a different manufacturer, yet all forms contain alprazolam, a benzodiazepine prescribed for anxiety-related conditions.

The types of Xanax bars most commonly encountered in clinical and illicit contexts are:

• White Xanax bars, Typically 2 mg of alprazolam; often generic.
• Green Xanax bars, May contain similar dosage; used interchangeably with yellow bars.
• Blue Xanax bars, Generally oval-shaped and contain 1 mg.

Despite similar chemical composition, color distinctions matter when verifying authenticity. Illegitimate pills often mimic these appearances to disguise counterfeit products.

All 2 mg Xanax bars by color & imprint

• White bar (brand): often X ANA X 2 imprint (brand Xanax 2 mg), rectangular, scored.
• Green bar (generic): common imprints include S 90 3 / S903 (2 mg), sometimes scored into 3 sections.
• Blue bar (generic): B707 appears on some versions; strength and appearance can vary by manufacturer. (Always verify using an identifier.)
• Yellow bar (generic): R039 imprint. This page.
• Colors indicate manufacturer, not potency differences by themselves. Always confirm imprint + dose.

Common Dosages of Alprazolam and Pill Strengths

Medical providers prescribe alprazolam in varying strengths depending on the patient’s diagnosis and response to treatment. Dosages typically range from 0.25 mg, 0.5 mg, 1 mg, up to 2 mg, which is the standard strength in most yellow Xanax bars.

Doctors often begin patients on small doses, like 0.5 mg. They then slowly increase the dose under clinical supervision.

Healthcare providers must precisely manage the dose of alprazolam to avoid dependency, withdrawal symptoms, and overdose risk. Doctors often use high-dose forms, like 2 mg, for severe anxiety or panic disorder. They also have a higher risk of misuse.

Education & Support

Is Xanax Addictive?

Xanax (alprazolam) is a benzodiazepine prescribed for anxiety and panic symptoms. It can be habit‑forming, and dependence can develop, especially with higher doses, longer use, or mixing with alcohol, opioids, or other sedatives. Use the quick quiz below to gauge potential risks and consider next steps. (If you’ve been taking Xanax regularly, don’t stop suddenly without medical guidance, withdrawal can be serious.)

Xanax Pills and Bars: Risks of Dependence and Misuse

Many people who misuse xanax pills and bars initially receive them through a legitimate prescription. Over time, some individuals develop tolerance and begin to take more than the prescribed amount. This behavior increases the likelihood of physical and psychological dependence. Individuals addicted to Xanax may experience intense cravings and withdrawal symptoms when they attempt to stop.

As a substance abused, alprazolam often appears in emergency room visits related to overdose. Misuse of high-dose formulations, such as yellow bar pills or xanax r039 yellow bars, is particularly concerning. The combination of alprazolam with other central nervous system depressants, such as opioids or alcohol, significantly increases the risks.

Dependence, withdrawal & safer treatment

Because alprazolam is fast‑acting, tolerance and dependence can develop quickly. Stopping abruptly can trigger rebound anxiety, insomnia, tremors, and seizures. A clinically supervised taper plus detox and therapy is the safest route to stop misuse and protect your health. If you’re struggling with non‑prescribed use or taking more than directed, help is available.

Nova Recovery Center offers medical detox, inpatient rehab, intensive outpatient (IOP), and sober living with evidence‑based care for benzodiazepine use. Call (512) 605-2955 for same‑day help in Austin, Houston and San Antonio, Texas.

Treatment Programs for Xanax Addiction

People experiencing symptoms of alprazolam dependence may benefit from structured treatment programs. These often include medically supervised detox, followed by cognitive-behavioral therapy and long-term aftercare planning. Experts create programs to fit each person’s needs, especially for polydrug abuse or mental health issues.

Treatment programs vary in intensity and setting, ranging from outpatient counseling to residential rehab centers. A comprehensive program addresses both the physical symptoms of withdrawal and the psychological aspects of addiction.

Abuse Potential

People often misuse yellow Xanax bars because of their potency and quick effects. Counterfeiters may create pills that appear as Xanax R039 yellow, R039 Xanax yellow bar, or yellow Xanax pills. Counterfeit versions often introduce dangerous substances and significantly elevate the risk of overdose.