GAVISCON ADVANCE PEPPERMINT SUSP 300ML

Indications

Approved Uses

Symptomatic treatment of gastro-oesophageal reflux (GERD) such as heartburn, acid regurgitation and indigestion, including situations such as after meals and during pregnancy, and in reflux oesophagitis-related symptoms.

Off-Label Uses

Laryngopharyngeal reflux (LPR)/extra-oesophageal reflux symptom relief (off-label).

Dosage & Administration

Dosing by Condition

Adults and adolescents ≥12 years: 10 mL (or 1 sachet) after meals and at bedtime, up to 4 times daily (maximum 40 mL/day).

Initial Dose

10ml (one sachet) after meals and at bedtime

Maintenance Dose

10ml up to 4 times daily after meals and at bedtime

Maximum Dose

40ml per day (10ml, four times a day).

Dose Adjustment Notes

No routine dose adjustment is required, but use caution in patients who need to restrict sodium intake (e.g., heart failure, renal impairment) and in severe renal impairment due to electrolyte load; consider total sodium/potassium exposure from the product.

How to Take

For oral use. Shake well before use. Take after meals and at bedtime; swallow directly (do not dilute). If using sachets, empty the full contents into the mouth or into a small amount of water and swallow.

How to Prepare

Ready to use. Shake well before use. If supplied as sachets, knead the sachet before opening and squeeze contents into the mouth or onto a spoon; no reconstitution required.

Safety & Warnings

Contraindications

Hypersensitivity to the active substances (sodium alginate, potassium bicarbonate) or to any excipients (including parabens if present in the specific product).

Warnings & Precautions

Contains sodium and potassium-use with caution in renal impairment, congestive heart failure, and in patients on sodium- or potassium-restricted diets; if symptoms persist or do not improve after 7 days, seek medical review.

Driving Warning

Safe

Drug Interactions

Interaction Severity

MODERATE: May reduce absorption of some oral medicines (e.g., tetracyclines, fluoroquinolones, iron salts, levothyroxine, bisphosphonates); separate by at least 2 hours (some references advise up to 4 hours for certain drugs).

Food Interaction

Take after meals and at bedtime for best effect (food enhances raft formation and post-prandial reflux protection).

Special Populations

Pregnancy

Safe

Storage & Patient Advice

Preparation Instructions

Ready to use. Shake well before use. If supplied as sachets, knead the sachet before opening and squeeze contents into the mouth or onto a spoon; no reconstitution required.

Missed Dose

If a dose is missed, take the next dose when needed (typically after the next meal/at bedtime); do not double the dose.

Stopping the Medicine

Safe to stop anytime. If symptoms persist after 7 days, consult a doctor.

Patient Counseling

Shake well; take after meals and at bedtime; separate from other oral medicines by ~2 hours; do not exceed the labeled maximum daily dose; seek medical advice if symptoms persist beyond 7 days or if alarm features occur; consider sodium/potassium load in patients on restricted diets or with renal/cardiac disease.

Monitoring Requirements

No routine monitoring required in healthy adults. Monitor serum potassium in patients with renal impairment or those on potassium-affecting medications.

Pharmacology

Mechanism of Action

Sodium alginate reacts with gastric acid to form a low-density viscous alginic-acid gel 'raft' that floats on stomach contents and acts as a physical barrier to reflux; potassium bicarbonate contributes CO2 to help the raft float and provides mild acid neutralization.

Onset of Action

Rapid-within minutes (often ~2-3 minutes).

Duration of Effect

Up to about 4 hours (commonly ~2-4 hours).

Half-Life

Not applicable (no meaningful systemic half-life); duration relates to gastric residence/raft persistence rather than plasma kinetics.

Bioavailability

Negligible systemic bioavailability; therapeutic effect is local (raft formation) in the stomach/oesophagus and does not require systemic absorption.

Metabolism

No clinically relevant systemic metabolism; alginate is not absorbed and passes through the GI tract, while bicarbonate is consumed in acid-base neutralization locally.

Excretion

Primarily eliminated via the GI tract (feces) as the alginate raft; bicarbonate is neutralized to CO2 and salts, with any absorbed electrolytes handled by normal renal homeostasis.

Protein Binding

Not applicable (not systemically absorbed to a clinically meaningful extent).

Product Information

Available Dosage Forms

Oral suspension (liquid) and oral suspension in sachets.

Composition per Dose

Each 10ml of oral suspension: 1000mg sodium alginate + 200mg potassium bicarbonate.

OTC Alternatives

Appropriate OTC alternatives for reflux/heartburn include: (1) other alginate/antacid products (e.g., Gaviscon Original or other sodium alginate-based formulations), (2) simple antacids (e.g., calcium carbonate; aluminum/magnesium salts where available), (3) H2-receptor antagonists (e.g., famotidine), and (4) OTC proton pump inhibitors (e.g., omeprazole) where locally approved/available; avoid listing ranitidine as a routine alternative due to widespread withdrawals/restrictions.

Gi Condition

Acid Reflux/GERD

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