I am famiiiar with ivermectin in three different formulations, there might be more. The paste that comes in a tube with a graduated plunger, an injectable and an alcohol based pour-on that is absorbed through the skin. I use the paste for horses and the pour-on for cattle. It is not unusual to get the pour-on on your skin when de-worming cattle. It comes in a container that holds about a gallon which you hang on the chute and use a plunger to squirt it on the cows back. I guess it could be used on other animals but you wouldn't want to saddle a horse soon after applying it to their back . It is alcohol based so you want to brand before you apply the de-wormer or you might set your cow on fire. Never had any adverse reaction from getting it on my skin.
