Nemex-2 Pyrantel Pamoate 2oz. Nemex® for dogs is a single-dose treatment to help remove large hookworms and roundworms. It is also commonly used in adult dogs, puppies, and lactating moms after whelping to help prevent potential reinfestation. Pyrantel Pamoate, the active ingredient, is a safe and effective wormer treatment. Best of all, Nemex®-2 for puppies has a tasty caramel flavor your dog will lick right up.