I started using fenbendazole these last 2 months. I was afraid to use it in the beginning of my treatment because of the severe overpopulation of strongyloides after steroids and I knew very little about the medicine. fenben works on all stages of the strongyloides and if I killed them to quick I didn't know if I was healthy enough to counter the die off. I still have a lot of encysted ones coming out of dormancy due to spring time in florida . just finished a 5 day double dose of fenben with dinner tonight. I weigh 205lbs and the tubes are for 1100lbs so I got 10 doses for 5 days every 12 hours. advice given to me on the ivermectin which I seemed to have better results was taken that every 12 hours 2 days on 1 day off when I am not taken the fenben. the first time I used the fenben I did a fifteen day 2 times a day and tolerated it extremely well. I did skip all ivermectin and albendazole during the fenben treatment. I will skip a couple of days then back to ivermectin starting sunday.