651 Pill — WHITE ROUND, 6mm — Clonidine
| Imprint | 651 |
|---|---|
| Colour | WHITE |
| Shape | ROUND |
| Size | 6 |
| Strength | CLONIDINE HYDROCHLORIDE 0.1 mg |
| Dosage form | Tablet, Extended Release |
| Manufacturer | Shionogi Inc. |
| NDC | 59630-670 |
| Schedule | — |
| Availability | — |
| Ingredients | CLONIDINE HYDROCHLORIDE[CLONIDINE] |
What does this imprint mean?
The imprint "651" 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
Clonidine
Uses and warnings
No boxed warning. Contraindicated in patients with "known hypersensitivity to clonidine." Most critical warning concerns abrupt discontinuation: "Sudden cessation of clonidine treatment has, in some cases, resulted in symptoms such as nervousness, agitation, headache, and tremor accompanied or followed by a rapid rise in blood pressure," so the dose should be "reduced gradually over 2 to 4 days." The label also warns the drug "may worsen sinus node dysfunction and atrioventricular (AV) block, especially in patients taking other sympatholytic drugs."
"Clonidine hydrochloride tablets are indicated in the treatment of hypertension" and "may be employed alone or concomitantly with other antihypertensive agents" to lower blood pressure.
How to identify this pill
- • Check the imprint matches exactly: "651".
- • Confirm the colour (WHITE) and shape (ROUND).
- • Compare the size (6) 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 3032e626-7e6a-423a-b2fa-3dd8c99b1c77.xml