Praziquantel, marketed as Biltricide, is an anthelmintic used in humans and animals for the treatment of tapeworms and flukes.Specifically, it is effective against schistosoma, Clonorchis sinensis the fish tapeworm Diphyllobothrium latum.raziquantel is used to treat diseases in humans, mammals, and fish that are caused by infection with several types of internal/gastrointestinal, and external parasites, including: