Antacid Regular Strength Chewable Tablets, Tropical Fruit Flavor, 66 ct, QC90057 Sale! This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. Compare to the Active Ingredient in Tums Regular Strength. Regular strength antacid chewable tablets. Multi-Symptom Relief: relieves heartburn, acid indigestion, sour stomach, and upset stomach