Check the mode of action of ivermectin (https://en.wikipedia.org/wiki/Ivermectin#Mechanism_of_action https://en.wikipedia.org/wiki/Ivermectin#Mechanism_of_actio

Check the mode of action of ivermectin (https://en.wikipedia.org/wiki/Ivermectin#Mechanism_of_action https://en.wikipedia.org/wiki/Ivermectin#Mechanism_of_action). It blocks nerve and muscle chloride channels resulting in paralysis. Humans rely on it not crossing the blood-brain barrier to avoid killing themselves. Viruses lack such channels, as do normal human cells.