The reason you feel bad after taking an effective de-wormer and they start to die and come out in toilet and all, is the toxins that they release when dieing-off. It's the die-off symptoms that damn near killed me/ My blood Sugar and blood pressure were skyrocketing up and down drastically, like off the charts in numbers up and down, up and down, real bad. What all that does to your body feels terrible and scary. I ended up with problems with my kidneys and all the numbers on my blood tests were off the charts high and low. Just dont forget to repeat the medicine of whatever you did, prob ivermectin, or whatever caused them to start dieing, you have to repeat that process a couple two or three times, like every 2 weeks, or every week, or whatever it is, daily for a few extra days. It depends on the particular medicine and dose that worked that time. Stick to that and must repeat for the life cycle, or it will just come back. And you dont want to get them immune to that med that worked, if that makes sense. As for the die-off symptoms, just try to treat or manage each one of those as they come and hang on tight for a roller coaster ride each time. Best of luck to you all and be blessed!