Genexa Antacid Maximum Strength is real medicine, made clean - providing maximum strength relief from heartburn, acid indigestion, sour stomach, and upset stomach associated with these symptoms. Each chewable tablet has the same active ingredient you need (calcium carbonate), but without the artificial ones you don’t (artificial dyes, common allergens, talc). We only use ingredients people deserve to make the first gluten-free, non-GMO, certified vegan medicines to help you feel better.