It depends on the dosages you take it in. Obviously, a lot of the nut jobs who think it is a cure all will also take hundreds of times the regular dosage, and will do serious harm to their health.Ivermectin has been around for decades and has FAR less side effects
Beyond that, it is a bad idea to take unnecessary drugs. Ivermectin is very good at treating worms, but worms are not a major problem in America.