Almost all drugs are tested in animals before humans. There's a huge overlap between "horse drugs" and "human drugs" (et cetera -- a snake of mine got infected by mites, and they don't make snake drugs, so the vet gave us drugs "made for rodents.") While certain drugs have been politicized, and that's bad, your comment is little more than an association fallacy driven by that same polarization. Please don't.

I wish people would stop horsing around and take the subject seriously.