A highly effective treatment for roundworm, tapeworm and hookworm, suitable for larger dogs. Clinically proven the tablets are easy to use, requiring only one dose to help keep your dog healthy and worm free. There is no permanent treatment for roundworm or tapeworm. Veterinarians recommend that adult dogs be wormed regularly, every 3 to 6 months as a routine measure. For dogs weighing more than 6kg.