Did you mean ivermectin? This is an approved drug for parasites, even in the US. It's very widely used in the Third World where there are some truly horrible parasites that can kill or blind people. It is quite safe, at the dose some people suggest for Covid-19. The only question is does it help or not.
You may actually be giving it to your dog. It's the main (or only) ingredient in Heartgard heart worm prevention.
