MK 0893 is primarily utilized in the field of medical research, particularly in the study of metabolic disorders. It functions as a potent and selective antagonist of the glucagon receptor, which plays a critical role in glucose metabolism. By blocking this receptor, MK 0893 helps researchers investigate the mechanisms of blood sugar regulation and its implications in conditions such as type 2 diabetes. This compound is also used in preclinical studies to explore potential therapeutic strategies for managing hyperglycemia and improving insulin sensitivity. Its application extends to understanding the broader physiological effects of glucagon receptor inhibition, including its impact on lipid metabolism and hepatic glucose production.