Drontal cat tablets are very effective as a single dose against most round and tape worms including dipylididum tape worm spread by cat fleas one tablet contains 20mg praziquantel and 230mg pyrantel embonate for the treatment of roundworms and tapeworms in cats uses drontal works with a single dose and kills all the common intestinal worms found in cats in the uk for the treatment of gastrointestinal roundworms and tapeworms of cats see also further information ascarids toxocara cati