TREATS FREQUENT HEARTBURN: Heartburn medicine for those who experience heartburn flare ups 2+ times a week With 1 PRILOSEC OTC PILL in the morning, BLOCK HEARTBURN. ALL DAY. ALL NIGHT.* PREVENT EXCESS ACID PRODUCTION for heartburn relief that lasts for 24 HOURS.* Starts working on DAY 1* CONTAINS ACTIVE INGREDIENT OMEPRAZOLE delayed-release 20mg, an acid reducer that provides long-lasting, heartburn relief* FSA and HSA eligible #1 DOCTOR and GASTROENTEROLOGIST RECOMMENDED frequent heartburn medicine for 15 straight years.^ SATISFACTION GUARANTEED or your money back.