To warm tortillas in the microwave, follow these steps: 1  Wrap a small stack of tortillas (2-6) in a damp paper towel. 2  Microwave for 30 seconds to 1 minute.
The H2 receptor antagonists are a class of drugs used to block the action of histamine on parietal cells (specifically the histamine H2 receptors) in the stomach, decreasing the production of acid by these cells.he prototypical H 2 antagonist was cimetidine, developed by Sir James Black at Smith, Kline & French (now GlaxoSmithKline) in the mid-to-late 1960s and first marketed in 1976; sold under the trade name Tagamet, cimetidine would later become the first ever blockbuster drug.
Abstract. Parenteral histamine (H 2)-receptor antagonists are frequently used to prevent upper gastrointestinal bleeding caused by stress-induced gastric mucosal damage in critically ill patients.ORRELATION BETWEEN BLOOD LEVELS AND GASTRIC PH The correlation between blood levels of H2-receptor antagonists and gastric pH has not always been straightforward in studies of use of these agents in intensive care units.