By week 8, 83 of patients treated with Famotidine had healed versus 45 of patients treated with placebo. Study, and at weeks 4, and in the international study, based on the number of ulcers that healed, confirmed by endoscopy. Based on the comparison of pharmacokinetic parameters for PEPCID in adults and pediatric patients, koper famotidine utan rx dosage adjustment in pediatric patients with moderate or severe renal insufficiency should be considered. Studies with Famotidine in man, in animal models, and in vitro have shown no significant interference with the disposition of compounds metabolized by the hepatic microsomal enzymes,.