Since the October 2004 approval of the drug Rumensin (monensin sodium) for increased milk production efficiency in dairy cows, the Food and Drug Administration Center for Veterinary Medicine has received numerous questions pertaining to its proper use. For this reason, the CVM has issued a document answering frequently asked questions.
Rumensin is the first approved new animal drug feed ingredient for dairy cows that increases milk production. After extensive review of data, the FDA concluded that meat and milk derived from dairy animals fed monensin would be safe, as long as the animals are fed according to the approved labeling.
The FAQ further defines specific terms and clarifies how to properly administer the medication so that products from the animals are safe for human consumption. For example, it clarifies the legality of using the drug if a cow's diet includes grass, or if monensin is used concurrently with other medications.
The FAQ is available at www.fda.gov/cvm/index/animalfeed/MonQA.htm. Individuals with additional questions should contact Dr. Dragan Momcilovic at the FDA/CVM, Division of Animal Feeds, 7519 Standish Place, HFV-220, Rockville, MD 20855; phone, (240) 453-6856; or Dragan [dot] Momcilovicfda [dot] gov.