It’s still insane to me that people were actually doing that. I know meds like ivermectin and pyrantel are used in humans but still… Horses have BIG organs, and that paste is a suspension dosed specifically to get rid of equine intestinal worms. It’s not the same as the pill you get from a pharmacy.

Even if those people who ate horse dewormer felt no ill effects I bet there’s some organ damage in there. I’d hazard a guess that human livers and kidneys don’t like high doses of that stuff.