most common side effects of glp 1 which least GLP-1 medications have changed the conversation around weight management Part 2 of a 3-Part

standard obesity coverage eliminated January 1, 2026

While many doctors prescribe it this way, insurance companies may not cover it for this purpose

Muscle loss is another concern with all GLP-1 drugs

It is driven primarily by glucagon receptor activation of the cAMP-PKA signaling pathway in cardiac tissue, which is a direct pharmacological effect rather than an indirect autonomic change

That said, multiple recent Cochrane reviews found that taking the GLP-1 medications offered by Ro semaglutide and tirzepatide can result in meaningful weight loss

The triple-receptor approach: how retatrutide targets GLP-1, GIP, and glucagon Retatrutide takes a fundamentally different approach