Safe-Guard (fenbendazole) oral drench removes and controls Lungworms, Stomach worms (adults & fourth stage larvae), brown stomach worms, barberpole worms, intestinal worms (adults and fourth stage larvae), hookworms, thread-necked intestinal worms, bankrupt worms and nodular worms. Treatment shows a clear advantage in dry matter intake, feedlot gain, improved health and pounds of beef produced.