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Disease modifying osteoarthritis (OA) drug
Horses and dogs
May Be Prescribed by Vets for:
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Pentosan polysulfate (PPS) is a heparin-like, semi-synthetic polysaccharide ester derived from beechwood hemicellulose. PPS is a mild anticoagulant, with anti-inflammatory, fibrinolytic, and hypolipidemic properties. In human medicine, PPS is used to treat interstitial cystitis, particularly in women.
In veterinary medicine, PPS is used to manage and treat OA. PPS is thought to help preserve cartilage integrity and to improve joint health by supporting anabolic activity of chondrocytes and synoviocytes. It also provides protection from catabolic events within the joint by reducing levels of cytokines and inflammatory mediators within cartilage matrix and synovial fluid.
PPS is used systemically in horses as a part of conservative management/treatment of OA. Studies have shown therapeutic levels in synovial fluid following intramuscular (IM) administration. PPS usually is administered by IM injection once a week for a series of four weeks. It also may be administered intra-articularly.
PPS is used in the medical management of OA and after joint surgery in dogs. In both instances, PPS is injected either subcutaneously or IM once a week for four consecutive weeks.
PPS affects clotting time. It should be used with caution in animals receiving anti-coagulants or those undergoing surgery in the near future.
Although no specific drug interactions were found, PPS should be used with care in animals receiving other drugs that affect clotting function.
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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