Chapter 35

Oral Glucose-Lowering Agents

Clifford J. Bailey

Clifford J. Bailey

School of Life and Health Sciences, Aston University, Birmingham, UK

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Andrew J. Krentz

Andrew J. Krentz

Institute for Cardiovascular and Metabolic Research, University of Reading, Reading, UK

Department of Population Health Sciences, King's College London, London, UK

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First published: 12 January 2024

Summary

Treatment of hyperglycaemia is fundamental to the management of type 2 diabetes. It is required to prevent and relieve acute symptoms and complications of hyperglycaemia; prevent, defer, and reduce the severity of microvascular complications; and afford some benefits against macrovascular complications. This chapter focuses on the role of oral blood glucose-lowering agents in the treatment of type 2 diabetes. The interdependent multiplicity of genetic and environmental factors underlying type 2 diabetes gives rise to a highly heterogeneous and progressive natural history. The pathophysiology typically involves defects of insulin secretion and insulin action. Metformin (dimethylbiguanide) is the only biguanide currently used in most countries. The history of biguanides stems from a guanidine-rich herb, Galega officinalis, which was used as a traditional treatment in Europe. Since their introduction in the 1950s, sulfonylureas have been used extensively as insulin secretagogues for the treatment of type 2 diabetes.

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