UPS, USPS, FEDEX and freight carriers all have a legal responsibility to conform to special standards applicable to mode of conveyance rules coming from ATA and DOT, This is just another bunch of rules coming from Food and Drug ~ little different than the mode rules, so they should be able to deal with it as well as their competitors.
My point is, why bother with the U.S. as a pickup and delivery point if the U.S. is going to be so anal about what is or isn't a drug?
Why should UPS have to care anyway? Their job is to ship parcel A to point B.
Now, the drug warriors want them to concern themselves with parcel A.
That is not their job.