WormScreen - worming tablets are a UK veterinary licensed treatment for roundworms, hookworms and tapeworms. The tablets come in two formulations for Cats or Dogs. The Dog tablets contain praziquantel, pyrantel embonate and febantel and are suitable for Dogs over 2 weeks old and 2kgs in weight. The Cat tablets contain Pyrantel embonate and praziquantel and are suitable for cats over 1kg and 6 weeks of age.