The FDA has expressed concerns about compounded versions, noting they "received multiple reports of adverse events, some requiring hospitalization, that may be related to dosing errors associated with compounded injectable semaglutide products." However, many patients used compounded versions successfully under proper medical supervision.
(PubMed) Wang Y, Li X, Guo Y, Chan L, Guan X
Extremely low prices for tirzepatide are red flags for counterfeit products in both clinical and research contexts
There are combination protocols where it is hard to know which ingredient caused the result
However, Novo Nordisks semaglutide sales (Ozempic, Wegovy and Rybelsus) gave Keytruda a run for its money
Psychiatry 29 , 137143 (2014)