I had 3 big tapeworms, so maybe 1 round of the Zymex ll for each! LOL! I am not sure, but that is what it took to get rid of them. I had a load of parasites and it did take a long time to get rid of them, but it was sure worth it.
I had absolutely NO side effects from this product as it is just a digestive enzyme and digests the worms all except for some of the skins and the outside of the heads.