“Ivermectin is most effective taken orally.”
The liquid form can be absorbed thru the skin. A sheep rancher I know had COVID as he was deworming his sheep. He was all better in 48 hours...
I have not used the topical IVM.
I might get sloppy with the dosage.
Once I took too much oral IVM and it gave me the Hershey squirts for four days. Crappy way to lose weight.