Doramectin aglycone is primarily used in veterinary medicine as an antiparasitic agent. It is effective against a wide range of internal and external parasites in livestock, including nematodes, mites, and ticks. The compound works by disrupting the nervous system of the parasites, leading to their paralysis and eventual death. It is commonly administered through injections or topical applications, ensuring prolonged protection and reducing the risk of reinfestation. Its use helps improve animal health, productivity, and overall welfare, making it a valuable tool in agricultural and livestock management practices.