New Animal Drugs for Use in Animal Feeds; Monensin, Bacitracin Methylene Disalicylate, and Roxarsone

The Food and Drug Administration (FDA) is amending the animal drug regulations to reflect approval of a new animal drug application (NADA) filed by Alpharma, Inc. The NADA provides for use of approved, single-ingredient monensin and bacitracin methylene disalicylate Type A medicated articles to make two-way combination drug Type C medicated feeds for broiler and replacement chickens. These combination medicated feeds are used as an aid in the prevention of coccidiosis, as an aid in the prevention and control of necrotic enteritis, and for increased rate of weight gain and improved feed efficiency.