Tapeworms are killed with praziquantel, which (to my knowledge) is only found in Zimectrin Gold, Quest Plus, and Equimax (along with ivermectin/moxidectin/ivermectin respectively). The three major classes of dewormers are ivermectin/moxidectin (with or w/o praziquantel), pyrantal pamoate, and fenbendazole/oxybendazole. You should rotate between the three classes and include the praziquantel at least once a year. The "PowerPack" is multiple doses of the fenbendazole consecutively.