Ivermectin is in the news right now because podcast giant Joe Rogan took it while sick with the Wuhan Flu. Many references to it in the news said it was a horse dewormer. I looked into it a bit more and discovered it won the Nobel Prize for Medicine in 2015.
Here's a good video describing it and why some people might have thought it was useful against the WuFlu.
Does it really work? Beats me. To me, the bigger question is why you would refer to it as a medicine for livestock. All you're doing is damaging your credibility in exchange for ... what?
Seriously, what's the upside here? Joe Rogan's use of it will fade from view in a day or two, but people seeing you as a partisan liar won't fade for quite a while.