Now I am dosing myself 9mg (50lbs) each time with yogert three times a day. I am fine with the drug except that I experienced a small effect of sleeping, but not too much. This drug is supposed to take once every 20 days. But in my case, I found it could control the itchines and moving the worms in the body only by doing every day. And still it is not comparable to the injection of ivermectin. But a lot easier to take, of course.