This item may qualify for a Zoetis Rebate! Visit their rebate site for more details.Strongid-P from Zoetis is a pyrantel based wormer that will effectively control tapeworms when used twice a year at double the recommended dose. This wormer is ideal when used routinely as a base wormer within a regular worming program to control roundworms, redworms and pinworms. One tube will treat a 1,250 lb horse.