Where drugmakers have to identify the manufacturer thatll supply their materials in their FDA drug application and have them inspected (and will also typically do their own regular testing to verify what they receive), compounders just need to get ingredients from an FDA-registered facility, a.k.a
Federici M, Hribal ML, Menghini R, et al
This variation depends on your starting weight, metabolism, and how consistently you follow your prescribed dosing schedule
The answer depends on your individual metabolic makeup, how long you've been on treatment, and whether your lifestyle changes have created lasting habits
[PubMed] [JNeurosci] [PubMed] Fuentes-Albero M, Cauli O
Unexpected side effects that differ significantly from your established pattern on tirzepatide also deserve investigation