EFFECTIVE: Compare Esomeprazole Magnesium Delayed Release Capsules, 20 mg to the active ingredient of Nexium® 24 HR.ACID REDUCER: Esomeprazole Magnesium works to inhibit acid production (and its overproduction) at the source so you can enjoy the foods and beverages that could cause frequent heartburn. This heartburn medicine may take 1 to 4 days for full effect.HEARTBURN TREATMENT: Take once every 24 hours for 14 days.PROVEN HEARTBURN TREATMENT: Esomeprazole Magnesium Delayed Release Capsules, 20 mg are clinically proven to treat frequent heartburn that occurs 2 or more days a week.GLUTEN FREE: This product is gluten free.