Dang, you are a hard-headed SOB. Look, if your such a woman that you aren't going touch Ivomec, then don’t. But don’t post your crap here. I know it works. It’s been used in humans for 40 years. Educate your stupid self. Here, I’ll help you out:

Ivermectin is a member of the macrocylic lactone class of endectocides which have a unique mode of action, Compounds of the class bind selectively and with high affinity to glutamate-gated chloride ion channels which occur in invertebrate nerve and muscle cells.
The margin of safety for compounds of this class is attributable to the fact that mammals do not have glutamate-gated chloride channels, the macrocylic lactones have a low affinity for other mammalian ligand-gated chloride channels and they do not readily cross the blood-brain barrier.