New Animal Drugs for Use in Animal Feeds; Melengestrol; Monensin; Tylosin

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The Food and Drug Administration (FDA) is amending the animal drug regulations to reflect approval of a supplemental new animal drug application (NADA) filed by Pharmacia & Upjohn Co., a Division of Pfizer, Inc. The supplemental NADA provides for use of the same dose levels approved for single-ingredient Type C medicated feeds containing melengestrol acetate, monensin, or tylosin phosphate for heifers fed in confinement for slaughter in three-way, combination drug Type C medicated feeds containing melengestrol acetate, monensin, and tylosin phosphate.