Need fast heartburn, acid indigestion and gas relief? Quality Choice Maximum Strength Antacid works on contact by neutralizing acid. The coating liquid antacid acts right on the source of your symptoms for quick relief. Although QC Max Strength Antigas is the strongest formulation you can buy, it is also gentle on your body so you can use it as directed every day. Provides fast soothing relief of acid indigestion, heartburn, sour stomach, pressure and bloating.