Drontal XL Plus for dogs allows you to treat dogs over 30kg with one tablet. Drontal kills all of the intestine worms that are commonly found in the UK in one single treatment. To keep your dog and in good health all year round, it is recommended that wormers are given every 3 months. This is important as worms in your pet can also be dangerous to humans. Tablet can administered on its own or with food and starvation is not necessary with this treatment.