Prophylaxis for acute stress ulcers. Antacids or cimetidine.

Two hundred and forty-nine patients are divided into four homogenous groups to compare the efficacy of Cimetidine versus antacids, as well as the mode of delivery--bolus versus continuous drip--in the prophylaxis of acute hemorrhagic gastritis in critically ill patients. Antacids were favored over Cimetidine, and the continuous drip was the superior method with both drugs.