To be honest, I know what you mean, because I have my own business in the field of pharmaceuticals. You know, there are quite a lot of rules that need to be taken into account. Therefore, I want to mention this source
https://www.natlawreview.com/article/federal-criminal-drug-counterfeiting-defense where you can learn about what federal criminal protection against drug counterfeiting is and how to avoid criminal liability for it. You can use this information to protect yourself in the future.