Retatrutide is an investigational triple receptor agonist that simultaneously targets glucagon-like peptide-1 (GLP-1), glucose-dependent insulinotropic polypeptide (GIP), and glucagon receptors
J Clin Pharmacol 55(5):497504 Lau J, Bloch P, Schffer L, Pettersson I, Spetzler J, Kofoed J, Madsen K, Knudsen LB, McGuire J, Steensgaard DB, Strauss HM, Gram DX, Knudsen SM, Nielsen FS, Thygesen P, Reedtz-Runge S, Kruse T (2015) Discovery of the Once-Weekly Glucagon-like Peptide-1 (GLP-1) Analogue Semaglutide
It has the same side effects profile as semaglutide
Some have even needed to be hospitalized for severe nausea, vomiting and stomach pain, but their cases seem to have resolved after they were given intravenous fluids and medications to control nausea