S21 Pill — WHITE OVAL, 16mm — Penicillin V
| Imprint | S21 |
|---|---|
| Colour | WHITE |
| Shape | OVAL |
| Size | 16 |
| Strength | PENICILLIN V POTASSIUM 500 mg |
| Dosage form | Tablet |
| Manufacturer | Northwind Pharmaceuticals |
| NDC | 51655-011 |
| Schedule | — |
| Availability | — |
| Ingredients | PENICILLIN V POTASSIUM[PENICILLIN V] |
What does this imprint mean?
The imprint "S21" 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
Penicillin V
Uses and warnings
Drug classA natural penicillin, beta-lactam antibiotic that exerts "a bactericidal action against penicillin-sensitive microorganisms during the stage of active multiplication" through "inhibition of biosynthesis of cell-wall...
Read the full drug profile →How to identify this pill
- • Check the imprint matches exactly: "S21".
- • Confirm the colour (WHITE) and shape (OVAL).
- • Compare the size (16) 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 8eee627c-3fd8-415e-ab52-61eb50b9b091.xml