I'm working on comparisons of what ingredients are in the different products, it'll take me some time.. but..
The Vaxa is what Newport meant with the one with the homeopathics- and yes, not strong homeopathics, but still a different formula of ingredients than are normally found in traditional parasite killing products.
It was one my dad also had a reaction to..which is why I say to start slow with the products and see first how you will react, and then increase. If you click on "ingredients", sulphur is the first listed one, which is something to consider with mercury, and is something that causes allergic reactions in many people.
Two of the things I've been reading effectively kill Tapeworms are the Kamala, and Granatum (pomegranate bark), which are both in the Vaxa Parasitin.