Cautions: 
Ketoconazole can interact with many other drugs. Fully disclose to your veterinarian any medications your pet is taking before giving ketoconazole. Do not use in pregnant or nursing animals.

Possible Side Effects:

If any of the following serious side effects occur, stop giving ketoconazole and seek emergency veterinary medical attention; an allergic reaction (difficulty breathing, swelling of the lips, tongue, or face; hives); or liver damage (yellowish eyes, abdominal pain, unusual fatigue, or dark urine). Other less serious side effects may occur. If any of the following side effects occur, continue to give ketoconazole and talk to your veterinarian; nausea, vomiting, or abdominal pain; diarrhea; headache; dizziness; fatigue; itching. Side effects other than those listed in this guide may occur. Talk to your veterinarian about any side effect that seems unusual or that is especially bothersome to the pet. 

Possible Drug Interactions:

Do not give ketoconazole if your pet is being given astemizole (Hismanal), cisapride (Propulsid) or triazolam (Halcion). Dangerous or life threatening events may occur. Before giving ketoconazole, tell your veterinarian about any medications you are giving your pet, especially; cyclosporine (Neoral), methylprednisolone (Medrol), antacids, cimetidine (Tagamet), Nizatidine (Axid), famotidine (pepcid), ranitidine (Zantac), omeprazole (Prilosec), lansoprazole (Prevacid), rabeprazole (Aciphex), digoxin (Lanoxin), warfarin (Coumadin), phenytoin (Dilantin), glipizide (Glucotrol). Drugs other than those listed in this guide may also interact with ketoconazole. Talk to your veterinarian or pharmacist before giving any prescription or over the counter medicines, including vitamins, minerals, and herbal products. 

Special Precautions: Keep away from children. Use this medication only for the indication prescribed.