Treatment of tapeworms affecting cats, including: Dipylidium caninum Taenia taeniaeformis Echinococcus multilocularis Please note that this product is only effective against tapeworms and does not treat other parasitic worms, including roundworms. Target species: Cat. Wormer for Cat & Kittens PraziquantelVeterinary Medicinal Product - UK AuthorisedActive Ingredients: contains 20mg Praziquantel in 0.5ml spot-on solutionFor Best Results There is no permanent treatment for worms. It is recommended to re-apply the product when signs of tapeworm infestation re-appear or at monthly intervals. It is also important to remove sources of possible re-infection such as fleas and mice.