Efficacy and safety of high‐dose glucagon‐like peptide‐1, glucagon‐like peptide‐1/glucose‐dependent insulinotropic peptide, and glucagon‐like peptide‐1/glucagon receptor agonists in type 2 diabetes

Jan 5, 2022Diabetes, obesity & metabolism

Effectiveness and safety of high-dose hormone treatments targeting blood sugar control in type 2 diabetes

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Abstract

Up to 97% of individuals with type 2 diabetes may achieve an HbA1c target of less than 7.0% with tirzepatide.

High-dose GLP-1 receptor agonists may enable up to 80% of individuals to reach an HbA1c of less than 7.0%.
Body weight loss of 10% or more was achieved by up to 69% of individuals using tirzepatide.
Gastrointestinal side effects were reported in 30%-70% of patients taking high-dose GLP-1 receptor agonists, primarily within the first two weeks.
The effects of cotadutide on glucose and weight reduction are comparable to those of liraglutide at 1.8 mg.
Up to 62% of individuals may reach normoglycemia with a 15-mg dose of tirzepatide.

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Glucagon-like peptide-1 receptor agonists (GLP-1 RAs) have become agents of choice for people with type 2 diabetes (T2D) with established cardiovascular disease or in high-risk individuals. With currently available GLP-1 RAs, 51%-79% of subjects achieve an HbA1c target of less than 7.0% and 4%-27% lose 10% of body weight, illustrating the need for more potent agents. Three databases (PubMed, Cochrane, Web of Science) were searched using the MESH terms 'glucagon-like peptide-1 receptor agonist', 'glucagon receptor agonist', 'glucose-dependent insulinotropic peptide', 'dual or co-agonist', and 'tirzepatide'. Quality of papers was scored using PRISMA guidelines. Risk of bias was evaluated using the Cochrane assessment tool. An HbA1c target of less than 7.0% was attained by up to 80% with high-dose GLP-1 RAs and up to 97% with tirzepatide, with even up to 62% of people with T2D reaching an HbA1c of less than 5.7%. A body weight loss of 10% or greater was obtained by up to 50% and up to 69% with high-dose GLP-1 RAs or tirzepatide, respectively. The glucose- and weight-lowering effects of the GLP-1/glucagon RA cotadutide equal those of liraglutide 1.8 mg. Gastrointestinal side effects of high-dose GLP-1 RAs and co-agonists occurred in 30%-70% of patients, mostly arising within the first 2 weeks of the first dose, being mild or moderate in severity, and transient. The development of high-dose GLP-1 RAs and the dual GLP-1/glucose-dependent insulinotropic peptide RA tirzepatide resulted in increasing numbers of people reaching HbA1c and body weight targets, with up to 62% attaining normoglycaemia with 15-mg tirzepatide. Whether this will also translate to better cardiovascular outcomes and affect treatment guidelines remains to be studied.

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Efficacy and safety of high‐dose glucagon‐like peptide‐1, glucagon‐like peptide‐1/glucose‐dependent insulinotropic peptide, and glucagon‐like peptide‐1/glucagon receptor agonists in type 2 diabetes

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