Review article: prevention of stress-related mucosal bleeding with proton-pump inhibitors.

Stress-related gastric mucosal bleeding occurs in a substantial number of critically ill patients, with clinically important gastrointestinal bleeding prolonging intensive care stay and increasing mortality. This paper reviews the role of proton-pump inhibitors in the prevention of stress-related mucosal bleeding. Bleeding prophylaxis appears to be warranted in patients in intensive care units on mechanical ventilation or those who have coagulopathy. Intravenous histamine H2 receptor antagonists, particularly cimetidine, have demonstrated efficacy for the prevention of bleeding in critically ill patients. Standard delayed-release proton-pump inhibitors have not been extensively studied in this patient group, but there are some data to support their efficacy in increasing intragastric pH, and in the case of intravenous pantoprazole in preventing gastrointestinal bleeding. In a large, randomized controlled trial, immediate-release omeprazole [(IR-OME) Zegerid powder for oral suspension; Santarus Inc., San Diego, CA, USA] administered via gastric tube, was as effective as intravenous cimetidine in the prevention of clinically significant bleeding, and more effective in increasing gastric pH. Effective antisecretory therapy does not appear to increase the risk of nosocomial pneumonia. In conclusion, immediate-release omeprazole provides a safe and effective alternative to intravenous cimetidine for the prevention of stress-related mucosal bleeding in critically ill patients.