S 4 Pill — WHITE OVAL, 19mm — Clarithromycin

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Imprint	S / 4
Colour	WHITE
Shape	OVAL
Size	19
Strength	CLARITHROMYCIN 500 mg
Dosage form	Tablet, Film Coated
Manufacturer	DirectRX
NDC	61919-643
Schedule	—
Availability	—
Ingredients	CLARITHROMYCIN[CLARITHROMYCIN]

What does this imprint mean?

The imprint "S 4" 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

Clarithromycin

Uses and warnings

No boxed warning. Contraindicated with "hypersensitivity to clarithromycin or any macrolide," and co-administration with cisapride, pimozide, ergot alkaloids, lurasidone, and (in patients with renal/hepatic impairment) colchicine, lovastatin, or simvastatin due to serious interaction risk. Key warnings include "severe acute hypersensitivity reactions" requiring immediate discontinuation, "QT prolongation" with risk of torsades de pointes, hepatotoxicity that can be severe and sometimes fatal, embryo-fetal toxicity, and Clostridioides difficile-associated diarrhea.

Indicated for mild to moderate infections including "acute bacterial exacerbation of chronic bronchitis," "acute maxillary sinusitis," "community-acquired pneumonia," "pharyngitis/tonsillitis," "uncomplicated skin and skin structure infections," "acute otitis media" in pediatric patients, treatment and prophylaxis of disseminated Mycobacterium avium complex infections, and, in combination regimens, "Helicobacter pylori infection and duodenal ulcer disease."

Read the full drug profile →

How to identify this pill

• Check the imprint matches exactly: "S 4".
• Confirm the colour (WHITE) and shape (OVAL).
• Compare the size (19) against a ruler if possible.
• When in doubt, confirm with a pharmacist before taking any medication.

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