I think it may have stunned the worms but I have since learned that I do not have tapes... I have round worms!!! I just took 6 days of mebendazole and I am in a 3 week break now. I start another round on April 1st and I'm praying that it will take care of it. I have noticed a major decrease in my symptoms and I am also going to the bathroom more regularly on my own without the use of enemas which is nice. ;-)