Two interesting side facts about Ivermectin. It's not just used to treat parasites in humans, but also other animals. Some breeds of working dogs have a gene mutation that make them highly vulnerable to the drug which can cause them brain damage, so veterinarians have to prescribe other anti-parasite drugs for those breeds. Additionally, the feces of animals who are given Ivermectin often take longer to break down because the drug is found in their droppings, thereby making them inhospitable to certain bugs.