The moxidectin has stopped the crawling sensation in my legs, ankels, and feet. I took a dose for two nights in a row. However, I still feel crawling and movement in my back.. not sure why. I did notice the difference between moxidectin and ivermectin according to the box says the moxidectin controls worms and small strongyle larvae and eggs. The ivermectin box doesn't say anything about larvae and eggs.