https://jefferspet.com/products/jeffers-ivermectin-for-horses?variant=44380387606717
6 for $53 and the cost of shipping.
No idea how this works on the skin, but IIRC it does taste better than Durvet.
fwiw, I have been using jeffers for several years now
++!!
Horse Health clearly made in USA. Jefferspet and Durvet look to be imported (but recall that the Durvet was previously made in USA as well as other brands). https://www.tractorsupply.com/tsc/search/ivermectin?isIntSrch=written
You may want to consider country of origin in addition to price —for this and other products.