Monthly chewable for heartworm and intestinal worm prevention ### Need to know - Contains Milbemycin Oxime (active ingredient) - Contains Praziquantel - Allergen info not declared  check packaging ### Good to know - Tasty chew loved by dogs - Synthetic formulation (wurm treatment active ingredients) - Best for: heartworm prevention, intestinal worm control; not ideal for other pets ### Bottom line Effective worm prevention but requires dosage based on weight.