prescribing for overweight or obesity was largely off-label, as this indication was not authorized until December 2022
(Retatrutide, GLP-1/GIP/GCGR ) , 25%
They include an N-terminal 120160 residue extracellular domain (ECD) and a C-terminal transmembrane domain (TMD), both of which are important for peptide hormone binding and activation 2
Standard clinical practice is to administer the first tirzepatide dose (2.5 mg) on the same injection day the semaglutide dose would have been due, then escalate tirzepatide at the label-specified 4-week intervals regardless of what semaglutide dose the patient was on
Prescribing information (Novo Nordisk, 2025)
Uncontrolled hypertension, coronary artery disease, and hyperthyroidism are listed as contraindications, along with a history of stimulant abuse