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Ardestani, A., Lupse, B., Kido, Y., Leibowitz, G

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This sparked research that eventually led to their approval as an obesity treatment in people with or without diabetes

Specifically, tirzepatide prescriptions increased from 0.7% in 2022 to 2.8% in 2025, whereas semaglutide prescriptions decreased from 4.2% in 2022 to 2.1% in 2025

These events stimulate the secretion of insulin, helping to compensate for insulin resistance triggered by new-onset diabetes. The drug also suppresses glucagon release by the pancreas, resulting in glucose-dependent reduction in plasma glucose and postprandial glucose by inhibiting hepatic glucose production and delaying gastric emptying. GLP-1s also act in brain regions associated with appetite and reward, reducing food intake and promoting weight loss

When administered, it binds to GHRH receptors on the somatotroph cells of the anterior pituitary gland