<prompt> The Inhibition of hydrochloric acid HC1 secretion by omeprazole occurs within an hour, reaches a peak at 2 hours, and plateaus by 4th day.After how many days will the secretion gradually normalize:24 hours1-2 days3-5 days3-5 days  <response>: secretion of omeprazole resumes gradually over 3-5 days of stopping drug ESSENTIALS OF MEDICAL PHARMACOLOGY SEVENTH EDITION KD TRIPATHI PG NO.652 