Drontal is a broad spectrum de-wormer. It has two different forms, one for dogs and one for cats. Both types of Drontal are in tablet form. Drontal eliminates different types of parasites. Tapeworms in both forms (Dipylidium caninum, Taenia taeniaeformis), large roundworms (Toxocara cati) and hookworms (Ancylostoma tubaeforme) are all treated by the drug. To avoid worms reaching maturity and affecting your pet's health, and to reduce public health risks, you should worm your pet regularly. Worming at least every three months with Drontal will reduce this risk, but ask your vet who will be able to evaluate your pet's health and your family's requirements and advise you on a specific worming routine for your pet.