(More customer reviews)After dealing with pinworms for months, taking prescriptions, and other OTC pinworm medicies I tried this product and it gave me horrible nausea and gas for about 36 hours afterward. I never experienced this with the other medicines. I also don't feel like it worked so I'll just have to go back to the doctor. Pinworms are resilient. I clean and take medicine and clean some more and thay always come back. I think thay're becoming immune to all the medications but if I decide to use another OTC it will be Reese's which tastes MUCH better and gives me no side effects. It's worth the few extra dollars.