If US customs pulls you for a random check, there's a chance you won't be allowed in. The ones who made it through customs weren't selected for screening. When it's just a GLP1 pen and you've got a script, I doubt there'd be any trouble—but other peps could become a problem if they decide to single you out.Ryty2266 said:
Thanks everyone! After going through all these replies, I feel much less worried overall about bringing my reconstituted peptides along, since it doesn’t appear to be a major issue.
TSA only handles domestic travel inside the US and won't give you any grief; US customs, on the other hand, is waging a war on drugs, particularly right now.