Moxidectin (CL301423) is a broad-spectrum anthelmintic used in veterinary medicine against heartworm and gastrointestinal nematodes in various animals. It is applied via oral, topical, or injectable routes, with formulations like Cydectin Pour-On used for cattle and deer. In research, it serves as a tool for studying parasite resistance mechanisms and anthelmintic efficacy in both in vivo and in vitro experimental models.