Found a white rectangle (bar-shaped) pill and not sure what it is? White rectangular tablets are relatively uncommon — most are high-dose benzodiazepines or muscle relaxants. Because this form is closely associated with controlled substances that have been heavily counterfeited, identification and caution are especially important. The only reliable identifier is the imprint code.
⚠ COUNTERFEIT WARNING: White rectangular "Xanax bars" are among the most frequently counterfeited pills in the U.S. Counterfeit bars containing fentanyl are widely documented and have caused numerous overdose deaths. Any white rectangular pill obtained outside a licensed pharmacy should be treated as potentially dangerous. Do not consume an unverified pill. For emergencies, call 911.
Most Common White Rectangle Pills
Alprazolam 2 mg
Generic / Xanax bar
High-dose benzodiazepine for severe anxiety and panic disorder. Schedule IV controlled substance. Widely counterfeited.
High-dose benzodiazepine for seizure disorders and panic disorder. Schedule IV controlled substance.
Common imprints: TEVA 834, 93 834, E 66
Tizanidine 4 mg
Generic / Zanaflex
Muscle relaxant for spasticity. Some manufacturers produce a white rectangular tablet form.
Common imprints: 4 (scored), A592
Buprenorphine / Naloxone
Suboxone (sublingual film — not a tablet)
Note: Suboxone is a sublingual film strip, not a compressed tablet. Buprenorphine sublingual tablets also exist in different shapes. Confirm form before identification.
Suboxone film: no pill imprint (it is a film strip)
Identify Your White Rectangle Pill
Enter the imprint code from your pill for an exact match — or search by shape and color to browse all options.
Rectangular (bar-shaped) pills most commonly score lines dividing them into two or four segments. Check both faces for an imprint — typically on the top face for Xanax-style tablets, reading along the bar's length. Write down every character including score marks.
Enter the full imprint, shape (rectangle), and color (white) in PillID's identifier. Because rectangular benzodiazepine tablets are among the most counterfeited forms, it is critical to confirm that the pill originated from a licensed pharmacy. Appearance alone cannot confirm authenticity.
If there is any doubt about the pill's origin or contents, do not consume it. Fentanyl test strips can detect fentanyl in crushed pill material. For poison or overdose emergencies, call 911 immediately or Poison Control at 1-800-222-1222.
Frequently Asked Questions
What is a white rectangle pill?
White rectangular (bar-shaped) tablets include alprazolam 2mg (Xanax bar, imprint G3722), clonazepam 2mg, and tizanidine 4mg. The imprint is the only reliable identifier. These forms are associated with controlled substances and are frequently counterfeited.
How do I identify a white rectangle pill without an imprint?
All U.S. prescription tablets require a unique imprint. A white rectangular pill without any imprint is highly suspicious — it may be a counterfeit drug. Do not consume it. Call Poison Control at 1-800-222-1222 or, for emergencies, 911.
Are white rectangle pills commonly counterfeited?
Yes. The white Xanax bar form is one of the most counterfeited pills in the United States. Counterfeit bars containing fentanyl are extensively documented and have caused fatal overdoses. Never consume a rectangular pill you cannot verify came from a licensed pharmacist filling a legitimate prescription.