The important thing is that Ivermectin is useless against viruses. Dozens of peer reviewed tests have shown this. Quacks etc who publish in paid to publish Indian and Chinese sing the praises of ivermectin. Ivermectin is cheap, and the strange thing about the people who want you to take it for Covid-19 is they sell ivermectin at 100-300 times the cost. Usually a conflict like this means = scam. On the other hand, if you ass itches or you or your dog/cat scoots their bum across the carpet, buy some horse dewormer for the dog(or you) - read the label and give the dog/cat a weight proportionate dose compared to the label weight for horses. Horse dewormer is over the counter at the farm store for $15 = treats 4000 pounds of horse, as a paste in a tube. Buy it at the vet for your cat = $50 for the visit and $25 for a pill or two.