Vetsupply: Drontal for cats is a broad spectrum Allwormer tablet for killing and controlling intestinal worms in cats. The tablet used as a single treatment treats tapeworm, hookworm and roundworm infections in kittens and cats. Used every 3 months, Drontal not only protects your cat from worms, it also helps protect the whole family from the harmful effects of contracting worms from your cat.