How do you spell relief? R-O-L-A-I-D-S. Heartburn can strike at any moment, but with Rolaids Extra Strength by your side, you're always prepared. Our powerful Dual Active formula combines the strengths of Calcium and Magnesium to effectively tackle heartburn, acid indigestion, sour stomach, and upset stomach associated with these symptoms. Don't let heartburn get in your way. Rolaids spells relief.