Careful there. It’s not merely a question of appropriate marking. In order for distribution of a controlled substance to be lawful under 21 USC 801, et seq., et al, you still need a bunch of permits and such. It’s not fine for private individuals to mail prescription drugs. FYI.
Upon further research, it would appear not, but damned if I’m gonna read through all of 21 CFR 1300, et seq. to find out for sure.
I wouldn’t think so. The referenced US Code title, 18 USC 1461, reads in part:
So, presription or nonprescription drugs or controlled substances which are intended for abortion are out, but a coat hanger would probably be fine, unless it included instructions for using it as an abortion tool, or were labelled to be used as such.