Avomec Duel Broad Spectrum Drench for Sheep is a dual combination antiparasitic drench containing abamectin and closantel for treatment and control of roundworms, nasal bot, itch mite and liver fluke in sheep. It has activity against resistant strains of Barber’s Pole Worm and 6-week sustained activity against closantel-susceptible Barber’s Pole Worm.