Which anthelmintic is often used in veterinary medicine as well as human medicine?

Ivermectin is widely recognized for its versatility as an anthelmintic agent used in both veterinary and human medicine. It is effective against a broad spectrum of parasites, including nematodes and ectoparasites. In veterinary practice, ivermectin is commonly employed to control various parasitic infections in livestock and pets, such as heartworm in dogs and intestinal parasites in cattle and horses.

In human medicine, ivermectin has gained prominence, particularly for treating conditions like lymphatic filariasis, onchocerciasis (river blindness), and strongyloidiasis. Its dual applicability across species makes it a significant agent in managing parasitic infections in both settings.

While other agents like praziquantel, albendazole, and mebendazole are effective in treating specific parasitic infections, they do not have the same broad application in both veterinary and human medicine as ivermectin does. Thus, the unique utility of ivermectin in various medical fields underscores its selection as the answer.