Omeprazole 20 mg Acid Reducer Capsules, 14 ct, QC96597 Quality Choice Sale! This item is a recurring or deferred purchase. By continuing, I agree to the cancellation policy and authorize you to charge my payment method at the prices, frequency and dates listed on this page until my order is fulfilled or I cancel, if permitted. This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. Compare to the Active Ingredients in Prilosec OTC. Treats frequent heartburn (occurs 2 or more days a week). Can take 1 to 4 days for full effect. One 14-day course of treatment.