Compare to Prilosec OTC. Heartburn beware: Amazon Basic Care Omeprazole Orally Disintegrating Tablets, 20 mg, Strawberry Flavor, make it easy to treat frequent heartburn that occurs 2 or more days per week. The 24-HR tablets melt in your mouth and dissolve without water, so they are great to use when you are on the go. This acid reducer treats frequent heartburn that occurs 2 or more days per week. The active ingredient omeprazole 20 mg is a Proton Pump Inhibitor (PPI), which deactivates acid-producing pumps in the stomach lining to inhibit acid production at the source. This product is not intended for immediate relief of heartburn; may take 1 to 4 days for full effect.