D-Worm Combo for Puppies and Small Dogs 6-25 lbs, 2 Chewable Tablets is a broad-spectrum dewormer that eliminates infestations of three common intestinal parasites: hookworms, roundworms, and tapeworms. D-Worm pet medications use two active ingredients, pyrantel pamoate and praziquantel, to remove worms. Recommended for dogs 12 weeks of age and older.