Gaviscon regular strength chewable foamtabs begin working immediately. Provides day & night-time relief of heartburn, acid reflux and gerd (gastro-esophageal reflux disease) symptoms. Doctor recommended gaviscon forms a protective foam barrier that blocks acid reflux for hours. Free from aluminium, lactose & gluten. Medicinal ingredients:200 mg alginic acid (derived from brown seaweed), 40 mg magnesium carbonate/tablet. Non-medicinal ingredients:(alpha) calcium stearate, fruit flavour, sodium bicarbonate, sugar.caution:relief of heartburn/acid reflux symptoms should occur within 5-10 minutes of taking the product. Consult a health care practitioner if symptoms persist, worsen or if heartburn symptoms occur more than once per week in a child, or if heartburn/acid reflux is accompanied by painful swallowing, weight loss, vomiting of blood or recurrent vomiting. Except under your doctor’s advice, if pregnant or on a low salt diet do not exceed 5 tablets per day, do not take if you suffer from kidney disease or within 2 hours of another medicine because effectiveness may be altered. Keep out of reach of children. Avoid excessive humidity.security feature: do not use if safety seal under cap is broken or missing.