1 pill does 80lbs and up. can be broken in half.  Proven and trusted complete gastrointestinal worm treatment for dogs.
Drontal Allwormer Tablets for Dog 77lbs is recommended for the control of all gastrointestinal worms in dogs including roundworm, hookworm, whipworm and tapeworm (including hydatid tapeworm).
Drontal is a formulation of three distinctly different proven drugs offering the broadest spectrum of activity against intestinal parasites.
Benefits
Convenient - It may be given safely to all dogs including old animals, young pups, working dogs and greyhounds.
Economical – One treatment controls all gastrointestinal worms for up to 3 months in mature dogs.