From Rennie
Rennie Heartburn, Indigestion & Wind Relief work quickly and effectively in two ways:1. Antacids (calcium carbonate and magnesium carbonate) get to work within minutes, powerfully neutralising excess acid in the stomach.2. Simeticone, a highly effective anti-foaming agent, causes the trapped air bubbles to combine and disperse, helping to eliminate the symptoms discreetly and without embarrassment.