I was under the impression that ivermectin for horses is roughly half the concentration than that of human dose.
Got a gallon few months ago. Was good as long as I remembered to shake it. Buddy that got it for me stopped using it as he believes it gave his 5 year old listeria. Pretty sure This wouldn’t have been a concern before the elite started surprising our immune systems. Maybe start off with small amounts until your body gets used to it.