503 Pill — WHITE ROUND, 9mm — Tizanidine
| Imprint | 503 |
|---|---|
| Colour | WHITE |
| Shape | ROUND |
| Size | 9 |
| Strength | TIZANIDINE HYDROCHLORIDE 4 mg |
| Dosage form | Tablet |
| Manufacturer | Aidarex Pharmaceuticals LLC |
| NDC | 53217-211 |
| Schedule | — |
| Availability | — |
| Ingredients | TIZANIDINE HYDROCHLORIDE[TIZANIDINE] |
What does this imprint mean?
The imprint "503" 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
Tizanidine
Uses and warnings
Drug classA centrally acting "alpha2-adrenergic agonist" skeletal muscle relaxant that reduces spasticity by increasing presynaptic inhibition of motor neurons, believed to act mainly on polysynaptic pathways within the spinal cor...
Read the full drug profile →How to identify this pill
- • Check the imprint matches exactly: "503".
- • Confirm the colour (WHITE) and shape (ROUND).
- • Compare the size (9) 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 e000ff99-a782-4438-a5d2-98a74b96b03a.xml