Drug reference directory
Drug reference

Calcium carbonate, Sodium bicarbonate, Sodium alginate

Antacid · Antacid; Anti-reflux agent

Also known as Acidex, Entrocalm Heartburn and Indigestion Relief, Gaviscon, Gaviscon Liquid Relief, Peptac

AntacidAntacid; Anti-reflux agent
CDSCO approvedOTC
EXCRETION
—
not curated
INTERACTIONS
—
none in our sources
PREGNANCY
—
not curated

Mechanism

Calcium carbonate and sodium bicarbonate act as antacids, neutralizing stomach acid to reduce acidity. Sodium alginate reacts with gastric acid to form a viscous gel, creating a protective raft that floats on the stomach contents, physically impeding the reflux of acid into the esophagus.

Indications

Gastro-oesophageal reflux diseaseHeartburn reliefIndigestion relief

Dosing

Adult
10–20 mL, to be taken after meals and at bedtime
Pediatric
Child 6–11 years: 5–10 mL, to be taken after meals and at bedtime; Child 12–17 years: 10–20 mL, to be taken after meals and at bedtime

Related guidelines

Other Antacid drugs

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Unreviewed·Updated: 2026-05-10