Panacur Granules is an anthelmintic multi-spectrum worming treatment for horses. The wormer aids in treating and controlling adult and immature forms of roundworms of the gastrointestinal worms in the horses. The granule formulation is effective against larval stages of adult and immature strongyles including encysted mucosal 3rd and 4th stage larvae. Fenbendazole is an active ingredient present in Panacur Granules for horses that destroys different worm eggs as well as adult worms. It is highly effective in controlling migrating larval and adult stages of roundworms and efficacious against migrating encysted larvae.