M 231 Pill — WHITE ROUND, 7mm — Atenolol
| Imprint | M / 231 |
|---|---|
| Colour | WHITE |
| Shape | ROUND |
| Size | 7 |
| Strength | ATENOLOL 50 mg |
| Dosage form | Tablet |
| Manufacturer | Cardinal Health |
| NDC | 55154-5455 |
| Schedule | — |
| Availability | Prescription only |
| Ingredients | ATENOLOL[ATENOLOL] |
What does this imprint mean?
The imprint "M 231" is a code stamped or printed on the tablet or capsule by the manufacturer, used to identify the drug, its strength and the maker.
Active ingredient
Atenolol
Uses and warnings
Drug class"Beta1-selective (cardioselective) adrenoreceptor blocking agent" - a beta-blocker that blocks the "positive chronotropic and inotropic effects of catecholamines," slowing heart rate and reducing the oxygen req...
Read the full drug profile →How to identify this pill
- • Check the imprint matches exactly: "M 231".
- • Confirm the colour (WHITE) and shape (ROUND).
- • Compare the size (7) against a ruler if possible.
- • When in doubt, confirm with a pharmacist before taking any medication.
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Official references
Source: FDA Structured Product Label via NLM Pillbox archive (retired 2021); source file 0b3611cb-0a30-43bb-988c-365f7c9da189.xml