Treat tapeworm in cats quickly and effectively with Droncit Spot-on Worming Drops for Cats. The veterinary-strength drops contain Praziquantel 20 mg and are easy to apply by squeezing the contents of a tube onto the back of the animal's neck. The systemic medication is absorbed into the blood via the skin. Dosage: 1 vial per 2.5 kg of body weight. Unsuitable for small cats and kittens under 1 kg.