Drontal flavour for Dogs is a tablet for the treatment of infestations by nematode and cestode worms.  Drontal Tasty Bone tablets work quickly to kill all types of intestinal worms commonly found in dogs, giving you peace of mind that you are protecting your dog from these unwanted visitors. It is administered at least every 3 months, however, if the dog lives in an outdoor environment, monthly administration may be recommended.