Found a white round pill and not sure what it is? White round tablets are among the most common forms in U.S. pharmacies — dozens of everyday medications share this appearance. The only reliable way to identify a specific pill is by its imprint code — the letters, numbers, or symbols stamped on the tablet. Below are the most commonly encountered white round pills, followed by a link to PillID's free identifier tool.
Most Common White Round Pills
Atorvastatin
Generic / Lipitor
Cholesterol-lowering statin — one of the most prescribed drugs in the U.S.
Common imprints: PD 155, ATV 10, G 10
Lisinopril
Generic / Prinivil, Zestril
ACE inhibitor for high blood pressure and heart failure.
Common imprints: lupin 10, M L 7, E 101
Metoprolol Succinate
Generic / Toprol-XL
Beta-blocker for high blood pressure and heart conditions.
Common imprints: M 50, A MS, 369
Amlodipine
Generic / Norvasc
Calcium channel blocker for high blood pressure and chest pain.
Common imprints: APO 5, G 1530, OM 5
Aspirin 81 mg
Bayer, St. Joseph, generic
Low-dose aspirin for heart attack and stroke prevention.
Common imprints: BAYER, 81, L 203
Metformin
Generic / Glucophage
First-line oral medication for type 2 diabetes.
Common imprints: 93 48, ZE 69, 142
Losartan
Generic / Cozaar
ARB for high blood pressure and kidney protection in diabetes.
Common imprints: 114, LU H12, 0222
Furosemide
Generic / Lasix
Loop diuretic for fluid retention and heart failure.
Common imprints: 54 583, MYLAN 216, cor 215
Hydrochlorothiazide
Generic / Microzide
Thiazide diuretic for high blood pressure and fluid retention.
Common imprints: MYLAN 810, 3170, C 25
Clonazepam 0.5 mg
Generic / Klonopin
Benzodiazepine for seizure disorders and panic disorder. Schedule IV controlled substance.
Common imprints: TEVA 832, M C13, 93 832
Identify Your White Round Pill
Enter the imprint code from your pill for an exact match — or search by shape and color to browse all options.
Start by examining the tablet closely under good light. Look for an imprint — the letters, numbers, or logo stamped or debossed into the surface. This is almost always present on U.S. prescription tablets; it is required by federal law. Record the imprint exactly as it appears, including any dividing score lines that separate characters.
With the imprint in hand, use PillID's identifier tool above, entering the imprint along with "white" and "round" to narrow results. The combination of all three filters — imprint, color, and shape — produces a highly accurate match in most cases. Different manufacturers may produce the same drug with different imprints, so results may show multiple entries for the same medication.
If your white round pill has no imprint at all, it is likely an over-the-counter supplement, a foreign-market medication, or a compounded tablet made by a specialty pharmacy. These are harder to identify without a label or pharmacy receipt. If you suspect someone has ingested an unknown substance, call Poison Control immediately at 1-800-222-1222.
Frequently Asked Questions
What is a white round pill?
White round tablets are one of the most common pharmaceutical forms. Dozens of high-volume medications — including atorvastatin, lisinopril, metoprolol, and aspirin — are manufactured this way. You cannot tell them apart by appearance alone; the imprint code is the only reliable identifier.
How do I identify a white round pill without an imprint?
U.S. law requires all manufactured prescription tablets to carry a unique imprint. A white round pill without any imprint is likely an OTC supplement, a foreign medication, or a compounded drug. For any emergency or suspected poisoning, call Poison Control at 1-800-222-1222 immediately.
Are white round pills ever controlled substances?
Yes. Some Schedule IV controlled substances — including clonazepam (Klonopin) and certain benzodiazepines — are manufactured as white round tablets by some generic makers. Always use the imprint to confirm the exact medication and manufacturer before drawing any conclusions.