Medicated Feed Against Swine Parasites, Dysentery Withdrawn

Jul 12, 2023

The Food and Drug Administration’s (FDA) Center for Veterinary Medicine (CVM) announced on June 30 the voluntary withdrawal of the combination medicated feed containing Safe-Guard (fenbendazole) and Lincomix (lincomycin) for use in pigs. The sponsor requested the agency withdraw the application.

The fenbendazole and lincomycin combination is used for the removal of certain internal parasites, the treatment and control of swine dysentery, and reduction in the severity of swine mycoplasmal pneumonia.

Lincomycin is a veterinary feed directive (VFD) drug, meaning any use of lincomycin, alone or in a combination, in feed requires a VFD order from a licensed veterinarian.

Fenbendazole and lincomycin are marketed as separate Type A medicated articles. Fenbendazole—also known as Safe-Guard— is marketed under new animal drug application (NADA) 131-675, and lincomycin—also known as Lincomix—is marketed under NADA 097-505. NADA 140-954 provided for the combination of these two medications in swine feed.

Because this NADA 140-954 has been withdrawn, mixing these two drugs in feed is no longer permitted, and VFD orders authorizing their use in combination may no longer be issued, the FDA CVM explained on its website.

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Video: What Causes Ear Necrosis in Pigs? - Alison Jeffery

In this episode of The Swine it Podcast Show Canada, Alison Jeffery, a PhD candidate at the University of Saskatchewan, discusses emerging research on ear necrosis in pigs. She explains the role of Fusobacterium necrophorum, how ear biting may introduce bacteria into damaged tissue, and what researchers are learning about disease progression, welfare, prevention, and future management tools. Listen now on all major platforms!

"Ear necrosis is not only an infectious disease challenge, it is also a welfare issue shaped by behavior, tissue damage, and the farm environment."

Meet the guest: Alison Jeffery / alison-jeffery is a PhD candidate in Large Animal Clinical Sciences at the University of Saskatchewan. Her research focuses on improving swine health and welfare by understanding and mitigating ear necrosis in pigs. Her background includes swine research, producer support, laboratory work, and studies in animal science and veterinary microbiology. Learn more from Alison Jeffery on The Swine it Podcast Show Canada, available on all major platforms.