What Is the R039 Yellow Xanax Bar?

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Yellow Xanax Bar (R039 / P039): Overview

A yellow Xanax bar is a 2 mg alprazolam tablet. People often mark it with “R039” or “P039.” People frequently refer to this pill as the ro39 pill yellow, pill r039 yellow, 039 yellow pill, or yellow bar pill. It matches other high-dose Xanax bars in strength but is unique because of its yellow color.

The R039 yellow Xanax bar is a 2 mg alprazolam tablet. It’s a rectangular, yellow, scored bar designed to split into four 0.5 mg sections. The imprint is R 0 3 9 and the product is labeled/marketed by Actavis (Teva generics). Alprazolam is a Schedule IV benzodiazepine.

Appearance & Identification

Color & Shape: Solid yellow, rectangular, divided into four segments
Imprint: “R039” or sometimes “P039”
Dosage: Contains 2 mg of alprazolam and is scored for easier division

People commonly call the yellow pill with 039 yellow xan or yellow xans.

Uses & Effects

Clinicians prescribe yellow Xanax bars to treat diagnosed anxiety-related disorders, including generalized anxiety and panic disorder, by directly targeting central nervous system overactivity. As a benzodiazepine, alprazolam provides calming effects and helps reduce overactive brain activity.

Onset & Peak: Effects typically begin within one hour and peak after one to two hours.

What does a 2 mg Xanax bar do?

Alprazolam is prescribed for anxiety and panic disorders. As a benzodiazepine, it dampens overactive brain activity and may take effect within about an hour; peaks roughly 1–2 hours after dosing. Because 2 mg is a high strength, clinicians typically reserve it for specific cases and often start patients lower and titrate carefully.

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.

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Common Side Effects

The use of yellow Xanax bars, including variations like r039 yellow bar and yellow pill p039, may result in:

Drowsiness or fatigue
Dizziness and lightheadedness
Dry mouth or nausea
Blurred vision and slurred speech
Muscle weakness or lack of coordination
Mood swings or low libido

More serious effects can include memory problems, confusion, and difficulty breathing.

Side effects & interaction risks to know

Common effects can include drowsiness, dizziness, coordination problems, slurred speech, and memory issues. Serious risks rise when combined with alcohol, opioids, sleep aids, antihistamines, some antibiotics/antidepressants, and other CNS depressants. Never mix alprazolam with alcohol or opioids. If you experience trouble breathing, extreme sleepiness, or confusion, seek emergency care.

Dependency & Withdrawal

Pills such as the pill xanax yellow, yellow ro39 bars, and ro39 yellow pill carry a high risk of dependence. Long-term use may lead to:

Increased tolerance
Physical and psychological dependence
Withdrawal symptoms when use is reduced or stopped

Withdrawal symptoms may include anxiety, insomnia, shaking, irritability, and seizures.

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.

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Safety & Interaction Concerns

Users should avoid combining yellow alprazolam or any bar pill with other depressants such as:

Alcohol
Opioids
Sleeping aids or muscle relaxants
Certain antidepressants and antibiotics

Doctors do not recommend using it during pregnancy or while breastfeeding because it may harm the baby.

Can you split the R039 bar?

Yes—these bars are scored to split into 0.5 mg quarters. Never change dose without your prescriber’s guidance; splitting should follow medical instructions to avoid over‑sedation, withdrawal, or dependence.

Recognizing Counterfeits

Authentic pills like the yellow bar r039 pill have clear imprints and consistent coloring. Counterfeit pills may have blurred or off-center text, an uneven surface, or unusual color. Always be cautious when identifying pills labeled r039 xanax, p039 yellow pill or xanax yellow bar r039.

Fake vs. real R039: quick safety checks

Counterfeit bars are common. To reduce harm:

Imprint quality: look for clean, centered “R 0 3 9”; fakes often have blurred/misaligned characters.
Surface/edges: fakes may look grainy or speckled, with rough edges.
Color: inconsistent yellow or unusually bright/faded hues can be suspicious.
Break lines: authentic bars are evenly scored; sloppy or off‑center scores are a red flag.
Source: medicine that didn’t come from a licensed pharmacy should be treated as unsafe—counterfeits are frequently laced (e.g., fentanyl) and have been the subject of recent alerts. Consider using fentanyl test stripsbefore any ingestion; the safest choice is do not use unknown pills.

Look‑alikes & misreads for “039”

Searchers often confuse “039” pills with other medications. Examples:

AN039 (Mucus Relief DM): yellow, oval—not alprazolam.
R 3 1039 (risperidone 3 mg): yellow, capsule/oblong—not alprazolam.
Always verify imprint + shape + color using a reputable identifier.

Dosage – How Many Mg in a Yellow Xanax Bar?

Each yellow Xanax bar contains 2 milligrams of alprazolam. You can divide the pill into halves (1 mg) or quarters (0.5 mg) to allow for smaller doses.

Common terms include:

2mg xanax bars yellow,
xanax bars 2mg yellow
yellow 2mg xanax bars
xanax pills yellow
yellow xanax r039
yellow xanax 2mg
039 pill yellow
yellow bar ro39
bars pills yellow
yello xanax
r039 yellow long pill

Treatment & Support

You should stop using high-dose bars like the yellow long pill or yellow Xanax with a doctor’s help. Effective treatment often includes:

Medically supervised tapering
Detox in a safe clinical environment
Therapy such as CBT, group support, or individual counseling
Long-term aftercare and relapse prevention

Professional treatment significantly reduces risks and supports sustainable recovery.

Treating Anxiety and Panic Disorders

Alprazolam is one of the most prescribed medicines in the United States. It is used for anxiety and panic disorder.

Clinicians may use it to treat anxiety and panic in acute settings where rapid relief is necessary. Doctors usually do not prescribe it for long-term use. This is because it has a short half-life and a high risk of abuse.

Doctors may recommend safer, longer-acting medications to treat anxiety disorders over time. People often use these alternatives in conjunction with therapy to manage symptoms without the risks associated with benzodiazepines.

Summary

Yellow Xanax bars (R039 / P039) contain 2 mg of alprazolam
Often referred to by names such as yellow bar pill, ro39 pill, and alprazolam yellow
Risk of misuse, addiction, and counterfeit pills is high
Use should always be monitored by a healthcare provider
Professional detox and rehab are recommended for those misusing or dependent on this medication

If you or someone you know is struggling with misuse of yellow Xanax bars, professional help is available. Recovery is possible with the right support and treatment.

References

Teva USA. Alprazolam Tablets, USP (R039, 2 mg)—product details, imprint, description, NDCs.
Drugs.com Pill Identifier. R 0 3 9 (Alprazolam 2 mg)—imprint, size, color, labeler, schedule, pregnancy category.
WebMD. Xanax (alprazolam) drug information—uses, interactions, cautions.
Recovered.org. Types of Xanax and How to spot fake Xanax—nicknames, imprint conventions, counterfeit risks.
HighAlert (NZ). Increase in fake ‘Xanax’ tablets—recent counterfeit alert notes.