Used primarily as an anthelmintic to treat parasitic worm infections, especially roundworm and hookworm in humans and animals. Commonly administered in pediatric medicine due to its effectiveness and safety profile. Often found in over-the-counter deworming medications. Also used in veterinary practice for dogs, cats, and horses to control gastrointestinal parasites. Works by paralyzing the worms, allowing the host to expel them naturally through bowel movements.