Doses ranging from 15 mg every other day to 180 mg per day maintained basal acid secretion below 10 mEq hr in patients without prior gastric surgery and below mEq hr in patients with prior gastric surgery. Went off the prevacid, had only been taking it for weeks just long enough to clear up buy prevacid without a rx the ulcer. For the pharmacokinetics of lansoprazole in pediatric patients with GERD aged less than 28 days and to 11 months. Oral PREVACID doses up to 5000 mg kg in rats approximately 1600 times the 30 mg human dose based on BSA and in mice about 800 times the 30 mg human dose based on BSA did not produce deaths or any clinical signs. Stanek, PharmD, senior director of research, personalized medicine research and development, Medco Health Solutions, Franklin Lakes, NJ, and the study principal investigator.