Survodutide

Survodutide (BI 456906; SAR-441255; CAS 2403761-22-2 mass) is a long-acting GLP-1 receptor and glucagon receptor dual agonist developed by Boehringer Ingelheim in collaboration with Zealand Pharma. The compound is a 39-residue lipidated peptide based on the glucagon and GLP-1 sequences, with selective potency approximately equivalent at the two receptors and with a fatty acid chain modification enabling once-weekly subcutaneous administration through serum albumin binding (the same pharmacokinetic strategy used by semaglutide, liraglutide, and tirzepatide). The dual-agonist mechanism produces synergistic effects on body weight: GLP-1 receptor agonism reduces appetite and slows gastric emptying through hypothalamic and brainstem pathways (the dominant mechanism shared with semaglutide and other GLP-1 monoagonists), while glucagon receptor agonism increases hepatic fatty acid oxidation and energy expenditure, mobilizing hepatic and visceral fat in a manner not achieved by GLP-1 monoagonism. Phase 2 obesity results published in 2024 reported up to approximately 19 percent body weight reduction at 46 weeks at the highest dose, similar to the magnitude observed with tirzepatide and substantially greater than semaglutide. The compound is in active Phase 3 development in obesity (SYNCHRONIZE program) and MASH (SYNCHRONIZE-2; metabolic dysfunction-associated steatohepatitis) with anticipated regulatory submissions in 2026 to 2027. Side effect profile parallels other GLP-1-class agents (nausea, vomiting, diarrhea, occasional gastroparesis) with the additional consideration of glucagon-related effects (modest heart rate elevation, occasional hypoglycemia masked by reduced insulin sensitivity, and consideration of bilirubin elevation). Survodutide is distinct from retatrutide (Eli Lilly's triple GLP-1/GIP/glucagon agonist) in lacking GIP receptor agonism and from cotadutide (AstraZeneca's GLP-1/glucagon dual) in pharmacokinetic profile and clinical positioning.