pharmacist on real connections pharmacy manager cial costico anthony kirkland nature compare to prilosec otcⓡ** see current drug facts omeprazole delayed release tablets 20 mg acid reducer actual size treats frequent heartburn! three 14-day courses of treatment may take 1 to 4 days for full effect kirkland signature products are subject to the manufacturing standards mandated by statements pertain to kirkland signature over-the-counter medicines only