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Dogs and cats
May Be Prescribed by Vets for:
Cholestatic liver disease of dogs and cats.
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Ursodiol, also known as ursodeoxycholic acid, is a hydrophilic bile-acid that has been used successfully in treatment of cholestatic liver-diseases of humans including chronic hepatitis, primary biliary cirrhosis, primary sclerosing cholangitis, intrahepatic cholestasis of pregnancy, non-alcoholic fatty liver disease, TPN-induced cholestasis, some pediatric cholestatic liver diseases, and graft/host liver transplant reactions. Ursodiol has a number of hepatoprotective properties including immunomodulatory, cytoprotective and membrane stabilizing effects on hepatic cells. It expands the bile acid pool by increasing flow and displaces hepatotoxic, hydrophobic bile acids. It suppresses the synthesis, secretion and intestinal absorption of cholesterol. Ursodiol is well-absorbed through oral administration.
Ursodiol is now used in a variety hepatobiliary conditions in small animals. Its use is better established in dogs although it also has been reported on in cats. In dogs, ursodiol is used in chronic hepatitis, some forms of acute hepatic failure or toxic injury, some congenital abnormalities including primary portal vein hypoplasia, and juvenile fibrosing liver disease.
There is less information on the use of ursodiol in cats, but it may be used in cases of chronic hepatitis and congenital portosystemic shunts.
Ursodiol should be given with food. Efficacy may be monitored by using liver enzymes, ultrasound, or other liver function tests.
Ursodiol generally is well tolerated. Vomiting and diarrhea rarely occur. Side effects in humans include diarrhea and other GI symptoms.
Concurrent antacid use may decrease the effectiveness of ursodiol.
The most likely occurrence with overdose is an increase in severity of GI signs, particularly diarrhea. Gastric-emptying, activated charcoal, and oral administration of an aluminum-containing antacid may be indicated.
Dr. Barbara Forney is a veterinary practitioner in Chester County, Pennsylvania. She has a master's degree in animal science from the University of Delaware and graduated from the University of Pennsylvania School of Veterinary Medicine in 1982.
She began to develop her interest in client education and medical writing in 1997. Recent publications include portions of The Pill Book Guide to Medication for Your Dog and Cat, and most recently Understanding Equine Medications published by the Bloodhorse.
Dr. Forney is an FEI veterinarian and an active member of the AAEP, AVMA, and AMWA.
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