Gentle, effective control of all 11 gastrointestinal worms Roundworm, hookworm, whipworm, tapeworm (including hydatid) Does not control heartworm in dogs. Safe for all dogs including old animals, young pups, working dogs and greyhounds. In pregnant bitches it should be given only in the last 10 days prior to whelping. Made with real liver. Directions for use_Given as a single dose by mouth. Fasting prior is not necessary. Hydatid Tapeworm_Dogs should be treated every 6 weeks to ensure that newly acquired hydatid tapeworm are expelled before reaching maturity. Hunting dogs that eat offal require hydatid tapeworm treatment. It should be noted that hydatid tapeworm poses a severe risk to human health by transmission to humans from infected dogs. Hookworms & roundworms_Dogs & Puppies_treat at 2, 4, 8 and 12 weeks and then every month until 6 months of age; thereafter every 3 months or on vet advice. Pregnant bitches_treat prior to mating, then 10 days before whelping and at 2 and 4 weeks after whelping. Whipworm & tapeworm_Treat every 6 months except in hydatid tapeworm areas where every 6 weeks is recommended.