Ivermectin is a foe of parasitic drug that has been around since the mid-1980s. It was at first found by Merck, who made it a probable treatment for onchocerciasis, even more regularly known as stream visual disability. From there on out, it has been used to fight parasites, things being what they are, including the parasitic worms that cause filariasis and elephantiasis. As specified before, it can't be purchased without a prescription because of its possible side effects which include numbness or paralysis, dizziness, upset stomach, and headache.