I have tried prazi. I REALLY like it. Any side effects seem nil if any. Maybe a slight queasiness, but when you suspect you have worms, you are probably already queasy. I was very cautious at first before taking it, which I think was very overblown. I felt very good the next day, and had a couple of stellar and *complete* BMs..
This might be a good first thing to try, before herbs or albendazole, both of which proportedly can cause 'scattering'. We got the 50g pond koi variety. I'm VERY satisfied with prazi, and can't see ANY reason why someone would not take it preventatively 4x/ year for Tapeworms and flukes.