530.41—Drugs prohibited for extralabel use in animals.
(a)
The following drugs, families of drugs, and substances are prohibited for extralabel animal and human drug uses in food-producing animals.
(9)
Sulfonamide drugs in lactating dairy cattle (except approved use of sulfadimethoxine, sulfabromomethazine, and sulfaethoxypyridazine);
(b)
The following drugs, families of drugs, and substances are prohibited for extralabel animal and human drug uses in nonfood-producing animals: [Reserved]
(d)
The following drugs, or classes of drugs, that are approved for treating or preventing influenza A, are prohibited from extralabel use in chickens, turkeys, and ducks: