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Title 21

Displaying title 21, up to date as of 7/09/2026. Title 21 was last amended 7/09/2026.
There have been changes in the last two weeks to Part 522.
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Title 21Food and DrugsPart / Section
Chapter IFood and Drug Administration, Department of Health and Human Services1 – 1299
Subchapter EAnimal Drugs, Feeds, and Related Products500 – 599
Part 522Implantation or Injectable Dosage Form New Animal Drugs522.23 – 522.2694
§ 522.23Acepromazine.
§ 522.52Alfaxalone.
§ 522.56Amikacin.
§ 522.62Aminopentamide.
§ 522.82Aminopropazine.
§ 522.88Amoxicillin.
§ 522.90Ampicillin injectable dosage forms.
§ 522.90aAmpicillin trihydrate suspension.
§ 522.90bAmpicillin trihydrate powder for injection.
§ 522.90cAmpicillin sodium.
§ 522.144Arsenamide.
§ 522.147Atipamezole.
§ 522.150Azaperone.
§ 522.158Bedinvetmab.
§ 522.161Betamethasone.
§ 522.163Betamethasone dipropionate and betamethasone sodium phosphate aqueous suspension.
§ 522.167Betamethasone sodium phosphate and betamethasone acetate.
§ 522.204Boldenone.
§ 522.224Bupivacaine.
§ 522.230Buprenorphine.
§ 522.234Butamisole.
§ 522.246Butorphanol.
§ 522.275N-Butylscopolammonium.
§ 522.304Carprofen.
§ 522.311Cefovecin.
§ 522.313Ceftiofur injectable dosage forms.
§ 522.313aCeftiofur crystalline free acid.
§ 522.313bCeftiofur hydrochloride.
§ 522.313cCeftiofur sodium.
§ 522.380Chloral hydrate, pentobarbital, and magnesium sulfate.
§ 522.390Chloramphenicol.
§ 522.454Clodronate.
§ 522.460Cloprostenol.
§ 522.468Colistimethate sodium powder for injection.
§ 522.480Corticotropin.
§ 522.500Cosyntropin injection.
§ 522.522Danofloxacin.
§ 522.533Deslorelin.
§ 522.535Desoxycorticosterone.
§ 522.536Detomidine.
§ 522.540Dexamethasone solution.
§ 522.558Dexmedetomidine.
§ 522.563Diatrizoate.
§ 522.650Dihydrostreptomycin sulfate injection.
§ 522.690Dinoprost.
§ 522.723Diprenorphine.
§ 522.770Doramectin.
§ 522.772Doramectin and levamisole.
§ 522.784Doxylamine.
§ 522.800Droperidol and fentanyl.
§ 522.810Embutramide, chloroquine, and lidocaine solution.
§ 522.812Enrofloxacin.
§ 522.814Eprinomectin.
§ 522.820Erythromycin.
§ 522.840Estradiol.
§ 522.850Estradiol valerate and norgestomet in combination.
§ 522.863Ethylisobutrazine.
§ 522.883Etorphine.
§ 522.914Fenprostalene.
§ 522.930Firocoxib.
§ 522.955Florfenicol.
§ 522.956Florfenicol and flunixin.
§ 522.960Flumethasone injectable dosage forms.
§ 522.960aFlumethasone suspension.
§ 522.960bFlumethasone acetate solution.
§ 522.960cFlumethasone solution.
§ 522.970Flunixin.
§ 522.995Fluprostenol.
§ 522.998Fluralaner.
§ 522.1002Follicle stimulating hormone.
§ 522.1008Frunevetmab.
§ 522.1010Furosemide.
§ 522.1014Gamithromycin.
§ 522.1020Gelatin.
§ 522.1044Gentamicin.
§ 522.1055Gleptoferron.
§ 522.1066Glycopyrrolate.
§ 522.1077Gonadorelin.
§ 522.1079Serum gonadotropin and chorionic gonadotropin.
§ 522.1081Chorionic gonadotropin.
§ 522.1083Gonadotropin releasing factor analog-diphtheria toxoid conjugate.
§ 522.1085Guaifenesin powder for injection.
§ 522.1086Guaifenesin solution.
§ 522.1125Hemoglobin glutamer-200 (bovine).
§ 522.1145Hyaluronate.
§ 522.1155Imidocarb powder for injection.
§ 522.1156Imidocarb solution.
§ 522.1160Insulin.
§ 522.1182Iron injection.
§ 522.1185Isoflupredone.
§ 522.1192Ivermectin.
§ 522.1193Ivermectin and clorsulon.
§ 522.1204Kanamycin.
§ 522.1222Ketamine.
§ 522.1223Ketamine, promazine, and aminopentamide.
§ 522.1225Ketoprofen.
§ 522.1242Levamisole.
§ 522.1260Lincomycin.
§ 522.1289Lufenuron.
§ 522.1290Luprostiol.
§ 522.1315Maropitant.
§ 522.1335Medetomidine.
§ 522.1338Medetomidine and vatinoxan.
§ 522.1350Melatonin implant.
§ 522.1362Melarsomine powder for injection.
§ 522.1367Meloxicam.
§ 522.1372Mepivacaine.
§ 522.1380Methocarbamol.
§ 522.1410Methylprednisolone.
§ 522.1450Moxidectin solution.
§ 522.1451Moxidectin microspheres for injection.
§ 522.1452Nalorphine.
§ 522.1465Naltrexone.
§ 522.1468Naproxen for injection.
§ 522.1484Neomycin.
§ 522.1503Neostigmine.
§ 522.1610Oleate sodium.
§ 522.1660Oxytetracycline injectable dosage forms.
§ 522.1660aOxytetracycline solution, 200 milligrams/milliliter.
§ 522.1660bOxytetracycline solution, 300 milligrams/milliliter.
§ 522.1662Oxytetracycline.
§ 522.1663Oxytetracycline hydrochloride with lidocaine injection.
§ 522.1664Oxytetracycline and flunixin.
§ 522.1680Oxytocin.
§ 522.1684Pegbovigrastim.
§ 522.1696Penicillin G procaine injectable dosage forms.
§ 522.1696aPenicillin G benzathine and penicillin G procaine suspension.
§ 522.1696bPenicillin G procaine aqueous suspension.
§ 522.1696cPenicillin G procaine in oil.
§ 522.1698Pentazocine.
§ 522.1700Pentobarbital and phenytoin.
§ 522.1703Pentobarbital.
§ 522.1704Pentosan polysulfate sodium.
§ 522.1720Phenylbutazone.
§ 522.1820Pituitary luteinizing hormone powder for injection.
§ 522.1850Polysulfated glycosaminoglycan.
§ 522.1860Pradofloxacin.
§ 522.1862Pralidoxime powder for injection.
§ 522.1870Praziquantel.
§ 522.1881Prednisolone acetate.
§ 522.1883Prednisolone sodium phosphate.
§ 522.1884Prednisolone sodium succinate.
§ 522.1890Prednisone suspension.
§ 522.1920Prochlorperazine and isopropamide.
§ 522.1940Progesterone and estradiol benzoate.
§ 522.1962Promazine.
§ 522.2002Propiopromazine.
§ 522.2005Propofol.
§ 522.2012Prostalene.
§ 522.2063Pyrilamine.
§ 522.2065Rabacfosadine.
§ 522.2075Robenacoxib.
§ 522.2076Romifidine.
§ 522.2092Secobarbital and dibucaine.
§ 522.2100Selenium and vitamin E.
§ 522.2112Sometribove zinc suspension.
§ 522.2120Spectinomycin hydrochloride.
§ 522.2121Spectinomycin sulfate.
§ 522.2150Stanozolol.
§ 522.2220Sulfadimethoxine.
§ 522.2240Sulfaethoxypyridazine.
§ 522.2260Sulfamethazine.
§ 522.2340Sulfomyxin.
§ 522.2343Testosterone propionate and estradiol benzoate.
§ 522.2404Thialbarbitone sodium for injection.
§ 522.2424Thiamylal.
§ 522.2444Thiopental injectable dosage forms.
§ 522.2444aThiopental powder for injection.
§ 522.2444bThiopental and pentobarbital powder for injection.
§ 522.2450Tigilanol.
§ 522.2460Tildipirosin.
§ 522.2470Tiletamine and zolazepam.
§ 522.2471Tilmicosin.
§ 522.2473Tiludronate.
§ 522.2474Tolazoline.
§ 522.2476Trenbolone acetate.
§ 522.2477Trenbolone acetate and estradiol.
§ 522.2478Trenbolone acetate and estradiol benzoate.
§ 522.2483Triamcinolone.
§ 522.2582Triflupromazine.
§ 522.2610Trimethoprim and sulfadiazine.
§ 522.2615Tripelennamine.
§ 522.2630Tulathromycin.
§ 522.2632Tulathromycin and ketoprofen.
§ 522.2640Tylosin.
§ 522.2662Xylazine.
§ 522.2670Yohimbine.
§ 522.2680Zeranol.
§ 522.2690Zinc gluconate.
§ 522.2694Zinc, copper, manganese, and selenium.