Member's Mark Omeprazole Delayed-Release Orally Disintegrating Tablets treats the same frequent heartburn symptoms as Member's Mark Omeprazole or Prilosec OTC©. This product melts in your mouth and dissolves without water. Taken once every 24 hours for 14 days, this tablet treats frequent heartburn that occurs two or more days a week. Not intended for immediate relief of heartburn; may take 1 to 4 days for full effect.