and chronic Lyme disease. Censorship of anecdotes about ivermectin helping this or that condition is routine, particularly when a vaccine is in the works. After the Lyme vaccine was recalled the same thing was going on with horse paste. Support groups were created. Books were written. People said they were cured. All anecdotal of course, no one wants to fund research into a cheap drug.
Get a prescription for the human version, you say? Medical providers are indemnified against any damages if they follow the federal treatment guidelines. They are explicitly liable for any bad outcomes if they use an unapproved treatment. That is why hospital administrators forbid ivermectin usage without a court order. Pharmacists won't fill prescriptions unless pressured. I expect big pharma carefully tracks those who do and get across the idea that is not good for their business.
So the veterinary version it is, for most that research IVM and ask their doctor about it, to get the answer "we don't use that here". Not hard to find the products with IVM only (no other active ingredients). And the dose is not hard to figure.
I suspect those poison center calls (if they really exist) were from worried family members who disagreed with someone using the animal product. And I suspect the usual answer to them (assuming they did not drink sheep drench or a gallon of high strength injectible) was not to worry, IVM is a very safe drug.