Merck

Panacur Paste contains 10 percent fenbendazole for the control of large and small strongyles, pinworms, ascarids and arteritis caused by the fourth-stage larvae of large strongyles in horses. It's safe for pregnant mares and foals, and has an apple-cinnam

This gel is prescribed to help control common internal parasites in horses—specifically large and small strongylus, pinworms and roundworms.