Used primarily as a veterinary anthelmintic, effective against a range of parasitic worms in livestock, especially liver flukes in sheep and cattle. Commonly applied in the control of Fasciola hepatica, it is administered orally or as a pour-on formulation. Shows high efficacy in eliminating both mature and immature stages of the parasite. Also investigated for potential antiviral and antiparasitic uses in humans, including studies in cancer and Zika virus inhibition, though not approved for human use. Its long residual activity makes it suitable for strategic parasite control programs in endemic areas.