Used as an active pharmaceutical ingredient in antiparasitic medications, particularly effective against a broad spectrum of gastrointestinal worms in animals and humans. It functions by inhibiting tubulin polymerization in parasites, leading to disruption of microtubule formation and ultimately causing paralysis and death of the organism. Commonly formulated in oral or injectable preparations for veterinary and clinical use. Also shows activity against certain protozoan infections. Its lipophilic nature allows for good tissue penetration and sustained systemic action.