Semaglutide falls into the category of medications called glucagon-like peptide-1 (GLP-1) receptor agonists. It operates by mimicking the GLP-1 hormone released in the gastrointestinal tract after meals. Among its functions, GLP-1 encourages insulin production, which helps lower blood sugar levels. Furthermore, elevated levels of GLP-1 interact with brain regions responsible for reducing appetite and signaling feelings of fullness.