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The FDA-approved metformin label confirms that metformin is not bound to plasma proteins, is not metabolized, and is excreted unchanged in urine with a renal clearance approximately 3.5 times creatinine clearance [6]

a Calculated by mutating Aib to Ala and Igl to Phe, respectively, in Semaglutide and SR18

Clinical Trial Evidence for Retatrutide The most widely referenced data comes from a Phase 2 trial published in the New England Journal of Medicine in 2023

Important safety considerations include a boxed warning for thyroid C-cell tumors, contraindication in patients with personal/family history of medullary thyroid carcinoma or Multiple Endocrine Neoplasia syndrome type 2, and precautions regarding pregnancy (not recommended), reduced oral contraceptive effectiveness, and risks of pancreatitis, gallbladder disease, and acute kidney injury