Lambert Kay Evict Double Strength Liquid Wormer for Puppies and Dogs, 2 Ounces removes large roundworms and hookworms from puppies and dogs. It is an FDA approved, highly palatable liquid that is easy to administer and prevents re-infestation of roundworms and hookworms. Active ingredient is Pyrantel Pamoate. Administer 1 teaspoon per 10 pounds of body weight. Proudly Made In the USA.