Compare to Pepcid Complete active ingredients. Equate Dual Action Complete, Chewable Tablets, Berry Flavor, with the active ingredients famotidine 10 mg, calcium carbonate 800 mg and magnesium hydroxide 165 mg, helps relieve heartburn due to acid indigestion. Gluten free heartburn medicine with acid reducer plus antacid is intended for adults and children 12 years and over. Chewable tablets, no water required.