U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 28, 2025

All TitlesTitle 21Chapter IPart 558Subpart B - Subpart B—Specific New Animal Drugs for Use in Animal Feeds
§ 558.55 - Amprolium.
§ 558.58 - Amprolium and ethopabate.
§ 558.59 - Apramycin.
§ 558.68 - Avilamycin.
§ 558.76 - Bacitracin methylenedisalicylate.
§ 558.78 - Bacitracin zinc.
§ 558.95 - Bambermycins.
§ 558.115 - Carbadox.
§ 558.128 - Chlortetracycline.
§ 558.140 - Chlortetracycline and sulfamethazine.
§ 558.175 - Clopidol.
§ 558.185 - Coumaphos.
§ 558.195 - Decoquinate.
§ 558.198 - Dichlorvos.
§ 558.205 - Diclazuril.
§ 558.235 - Efrotomycin.
§ 558.248 - Erythromycin.
§ 558.254 - Famphur.
§ 558.258 - Fenbendazole.
§ 558.261 - Florfenicol.
§ 558.265 - Halofuginone.
§ 558.274 - Hygromycin B.
§ 558.295 - Iodinated casein.
§ 558.300 - Ivermectin.
§ 558.305 - Laidlomycin.
§ 558.311 - Lasalocid.
§ 558.325 - Lincomycin.
§ 558.330 - Lubabegron.
§ 558.340 - Maduramicin.
§ 558.342 - Melengestrol.
§ 558.348 - Mibolerone.
§ 558.355 - Monensin.
§ 558.360 - Morantel.
§ 558.363 - Narasin.
§ 558.364 - Narasin and nicarbazin.
§ 558.365 - Neomycin sulfate.
§ 558.366 - Nicarbazin.
§ 558.415 - Novobiocin.
§ 558.430 - Nystatin.
§ 558.450 - Oxytetracycline.
§ 558.455 - Oxytetracycline and neomycin.
§ 558.464 - Poloxalene.
§ 558.470 - Polyoxyethylene.
§ 558.485 - Pyrantel.
§ 558.500 - Ractopamine.
§ 558.515 - Robenidine.
§ 558.550 - Salinomycin.
§ 558.555 - Semduramicin.
§ 558.575 - Sulfadimethoxine and ormetoprim.
§ 558.582 - Sulfamerazine.
§ 558.586 - Sulfaquinoxaline.
§ 558.612 - Tiamulin.
§ 558.618 - Tilmicosin.
§ 558.625 - Tylosin.
§ 558.630 - Tylosin and sulfamethazine.
§ 558.633 - Tylvalosin.
§ 558.635 - Virginiamycin.
§ 558.665 - Zilpaterol.
§ 558.680 - Zoalene.
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