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- 21 CFR 520.1484 · Neomycin.
- 21 CFR 520.1510 · Nitenpyram.
- 21 CFR 520.1604 · Oclacitinib.
- 21 CFR 520.1615 · Omeprazole.
- 21 CFR 520.1616 · Orbifloxacin tablets.
- 21 CFR 520.1618 · Orbifloxacin suspension.
- 21 CFR 520.1628 · Oxfendazole powder and pellets.
- 21 CFR 520.1629 · Oxfendazole paste.
- 21 CFR 520.1630 · Oxfendazole suspension.
- 21 CFR 520.1631 · Oxfendazole and trichlorfon paste.
- 21 CFR 520.1638 · Oxibendazole.
- 21 CFR 520.1660 · Oxytetracycline.
- 21 CFR 520.1660a · a [Reserved]
- 21 CFR 520.1660b · b Oxytetracycline capsules.
- 21 CFR 520.1660c · c Oxytetracycline tablets.
- 21 CFR 520.1660d · d Oxytetracycline powder.
- 21 CFR 520.1664 · Oxytetracycline and carbomycin.
- 21 CFR 520.1696 · Penicillin.
- 21 CFR 520.1696a · a Penicillin G powder.
- 21 CFR 520.1696c · c Penicillin V tablets.
- 21 CFR 520.1705 · Pergolide.
- 21 CFR 520.1720 · Phenylbutazone oral dosage forms.
- 21 CFR 520.1720a · a Phenylbutazone tablets and boluses.
- 21 CFR 520.1720b · b Phenylbutazone granules.
- 21 CFR 520.1720c · c Phenylbutazone paste.
- 21 CFR 520.1720d · d Phenylbutazone gel.
- 21 CFR 520.1720e · e Phenylbutazone powder.
- 21 CFR 520.1760 · Phenylpropanolamine.
- 21 CFR 520.1780 · Pimobendan tablets.
- 21 CFR 520.1782 · Pimobendan solution.
- 21 CFR 520.1802 · Piperazine-carbon disulfide complex oral dosage forms.
- 21 CFR 520.1802a · a Piperazine-carbon disulfide complex suspension.
- 21 CFR 520.1802b · b Piperazine-carbon disulfide complex boluses.
- 21 CFR 520.1802c · c Piperazine-carbon disulfide complex with phenothiazine suspension.
- 21 CFR 520.1803 · Piperazine citrate capsules.
- 21 CFR 520.1805 · Piperazine phosphate with thenium closylate tablets.
- 21 CFR 520.1806 · Piperazine suspension.
- 21 CFR 520.1840 · Poloxalene.
- 21 CFR 520.1855 · Ponazuril.
- 21 CFR 520.1858 · Potassium bromide chewable tablets.
- 21 CFR 520.1860 · Pradofloxacin.
- 21 CFR 520.1870 · Praziquantel tablets.
- 21 CFR 520.1871 · Praziquantel and pyrantel.
- 21 CFR 520.1872 · Praziquantel, pyrantel pamoate, and febantel tablets.
- 21 CFR 520.1880 · Prednisolone.
- 21 CFR 520.1892 · Pregabalin.
- 21 CFR 520.1900 · Primidone.
- 21 CFR 520.1920 · Prochlorperazine and isopropamide.
- 21 CFR 520.1921 · Prochlorperazine, isopropamide, and neomycin.
- 21 CFR 520.1962 · Promazine.
- 21 CFR 520.2002 · Propiopromazine.
- 21 CFR 520.2041 · Pyrantel pamoate chewable tablets.
- 21 CFR 520.2042 · Pyrantel pamoate tablets.
- 21 CFR 520.2043 · Pyrantel pamoate suspension.
- 21 CFR 520.2044 · Pyrantel pamoate paste.
- 21 CFR 520.2045 · Pyrantel tartrate powder.
- 21 CFR 520.2046 · Pyrantel tartrate pellets.
- 21 CFR 520.2075 · Robenacoxib.
- 21 CFR 520.2086 · Sarolaner.
- 21 CFR 520.2090 · Sarolaner, moxidectin, and pyrantel.
- 21 CFR 520.2098 · Selegiline.
- 21 CFR 520.2100 · Selenium and vitamin E.
- 21 CFR 520.2123 · Spectinomycin oral dosage forms.
- 21 CFR 520.2123a · a Spectinomycin tablets.
- 21 CFR 520.2123b · b Spectinomycin powder.
- 21 CFR 520.2123c · c Spectinomycin solution.
- 21 CFR 520.2130 · Spinosad.
- 21 CFR 520.2134 · Spinosad and milbemycin.
- 21 CFR 520.2138 · Spironolactone and benazepril.
- 21 CFR 520.2150 · Stanozolol.
- 21 CFR 520.2158 · Streptomycin.
- 21 CFR 520.2184 · Sulfachloropyrazine.
- 21 CFR 520.2200 · Sulfachlorpyridazine.
- 21 CFR 520.2215 · Sulfadiazine/pyrimethamine suspension.
- 21 CFR 520.2218 · Sulfamerazine, sulfamethazine, and sulfaquinoxaline powder.
- 21 CFR 520.2220 · Sulfadimethoxine oral dosage forms.
- 21 CFR 520.2220a · a Sulfadimethoxine oral solution and soluble powder.
- 21 CFR 520.2220b · b Sulfadimethoxine suspension.
- 21 CFR 520.2220c · c Sulfadimethoxine tablet.
- 21 CFR 520.2220d · d Sulfadimethoxine bolus.
- 21 CFR 520.2220e · e Sulfadimethoxine extended-release bolus.
- 21 CFR 520.2220f · f Sulfadimethoxine and ormetoprim tablet.
- 21 CFR 520.2240 · Sulfaethoxypyridazine.
- 21 CFR 520.2240a · a Sulfaethoxypyridazine solution.
- 21 CFR 520.2240b · b Sulfaethoxypyridazine tablets.
- 21 CFR 520.2260 · Sulfamethazine oral dosage forms.
- 21 CFR 520.2260a · a Sulfamethazine oblets and boluses.
- 21 CFR 520.2260b · b Sulfamethazine sustained-release boluses.
- 21 CFR 520.2260c · c Sulfamethazine sustained-release tablets.
- 21 CFR 520.2261 · Sulfamethazine sodium oral dosage forms.
- 21 CFR 520.2261a · a Sulfamethazine solution.
- 21 CFR 520.2261b · b Sulfamethazine powder.
- 21 CFR 520.2280 · Sulfamethizole and methenamine.
- 21 CFR 520.2325 · Sulfaquinoxaline oral dosage forms.
- 21 CFR 520.2325a · a Sulfaquinoxaline powder and solution.
- 21 CFR 520.2325b · b Sulfaquinoxaline drench.
- 21 CFR 520.2330 · Sulfisoxazole tablets.
- 21 CFR 520.2335 · Telmisartan.
- 21 CFR 520.2340 · Tepoxalin.
- 21 CFR 520.2345 · Tetracycline.