“…Ranitidine @2mg/kg IV q 12 hr has not been shown a major effect on gastric acid suppression . Proton pump inhibitors are the most potent agents for suppression of gastric acid secretion by the inhibition of the gastric H+/K+-ATPase enzyme (the proton pump), which leads to failing the gastric secretion and rising the intragastric mucosal pH (Miner et al, 2003;Scott et al, 2002). Mainly clinically available proton pump inhibitors (PPI) are omeprazole, esomeprazole, lansoprazole, rabeprazole, and pantoprazole (Miner et al, 2003).…”