New Animal Drugs for Use in Animal Feeds; Roxarsone; Semduramycin

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The Food and Drug Administration (FDA) is correcting the single-ingredient roxarsone Type A medicated article that may be used to formulate three-way, combination drug Type C medicated broiler chicken feeds containing semduramicin, virginiamycin, and roxarsone under a new animal drug application (NADA) recently approved for Phibro Animal Health. FDA is also amending the animal drug regulations to reflect two roxarsone Type A medicated articles approved under separate new animal drug applications (NADAs) for different conditions of use. This action is being taken to improve the accuracy of the agency's regulations.