Pharmacists & Prescribers: Compounding GLP 1 meds like semaglutide & tirzepatide is generally prohibited, unless strict exceptions are met (e.g., FDA shortage + clinical necessity for an individual patient). Violations may lead to Will Compounded Semaglutide Be Banned in the US? GLP 1 with L Carnitine, B12, and B6 Reduce Nausea and Fatigue Companies that make compounded drugs obtain semaglutide API from authorized and registered chemical manufacturers.