C4 Pill — YELLOW ROUND, 10mm — Doxazosin
| Imprint | C4 |
|---|---|
| Colour | YELLOW |
| Shape | ROUND |
| Size | 10 |
| Strength | DOXAZOSIN MESYLATE 4 mg |
| Dosage form | Tablet |
| Manufacturer | Accord Healthcare Inc. |
| NDC | 16729-213 |
| Schedule | — |
| Availability | Prescription only |
| Ingredients | DOXAZOSIN MESYLATE[DOXAZOSIN] |
What does this imprint mean?
The imprint "C4" 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
Doxazosin
Uses and warnings
No boxed warning. Contraindicated in patients with "hypersensitivity to doxazosin, other quinazolines, or any other ingredient." Key warnings: "postural hypotension with or without syncope may occur," especially with the first dose; risk of "Intraoperative Floppy Iris Syndrome" during cataract surgery in patients on or previously treated with alpha1-blockers; BPH patients should be screened for prostate cancer before starting therapy; alpha1 antagonists "have been associated with priapism (painful penile erection)."
Doxazosin mesylate tablets are indicated for: - Treatment of the "signs and symptoms of Benign Prostatic Hyperplasia (BPH)" - "Treatment of Hypertension," to lower blood pressure and reduce the risk of cardiovascular events.
How to identify this pill
- • Check the imprint matches exactly: "C4".
- • Confirm the colour (YELLOW) and shape (ROUND).
- • Compare the size (10) 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 544d549e-a6f3-24a5-e054-00144ff8d46c.xml