Kills roundworms, hookworms and pinwormsNo prescription needed. Same active ingredient (Pyrantel Pamoate) as the prescription Strongid-T, but no prescription required. Used to rid animals of roundworms, hookworms and pinworms.Each 1 ml. contains 50 mg. pyrantel base, the same active ingredient and strength as Strongid T and Imathal.Labeled for the treatment of pinworms in humans.