Yes these meds are well composed and they seem to work wonders on roundworms and threadworms. I have been having a huge amount of birthing in sinus and lungs as well as intestines so for me a few additions are needed. Lets say i am doing a cocktail of everything on top. The movement stops on a few things but it takes a while, like alb low dose, 200-400mg p day (need months before they start ageing on this), piperazines (the safest is the natural version), DEC and for me doxy helped as well but some say that does nothing for them. for me fenben, ivm and moxi together alone does not work as well as when i add these on top. I do low doses and periods and do liver support so i am not worried about the damage the meds do, more the damage the worms cause. I seem to kill many in the lower GI with saline enemas as well as that is hard to reach with meds. Some even say to take half a teaspoon prazi with moxi plus to enhance its effect along with alb 200mg.