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Therapeutic ClassMonoamine Oxidase Inhibitor
May Be Prescribed by Vets for:
FDA StatusSelegiline is
commercially available as Anipryl® tablet
2mg, 5mg, 10mg, 15mg and 30mg; (Human) oral tablet and
capsule 5mg and 1.25mg tablet; transdermal patch, 6mg,
9mg and 12mg per 24 hour.
Search for Available Dosage Forms
Selegiline or L-Deprenyl is a centrally acting, selective, irreversible monamine oxidase-B (MAO-B) inhibitor that is FDA-approved for use in dogs for the treatment of canine cognitive dysfunction and pituitary-dependent Cushing’s disease. Selegiline is approved for use in humans as an adjunct for the treatment of Parkinson’s disease.
Monoamine oxidase inhibitors primarily act by increasing dopamine levels in the brain. Selegiline is metabolized into L-desmethylselegiline, amphetamine, and methamphetamine. All of these metabolites act as CNS stimulants. At higher doses selegiline
also may inhibit MAO-A. Selegiline is primarily excreted in the urine.
Selegiline is the only FDA-approved treatment for canine cognitive
dysfunction. Although the onset of action can be variable (between four and12 weeks), most dogs show some improvement after one month of treatment and there may be continued improvement over time. The neuroprotective effects of selegiline are thought to be due to increased dopamine levels. Selegiline does not cure canine cognitive dysfunction but can improve quality of life for both the pet and the owner. Selegiline has also been used off-label for cognitive dysfunction in the cat.
Selegiline is also approved for use in pituitary dependent hyperadrenocorticism (PDH). It is less commonly used for the treatment of PDH as more recent research on efficacy has not been particularly supportive..
There are a number of potential drug interactions between MAO inhibitors in humans that may be of significance in the dog. There is very little specific veterinary information regarding these interactions. In human medicine, the recommended washout time for MAO inhibitor drugs and other drugs that may interact can be weeks.
If acute overdose is recognized promptly, gut-emptying protocols may be of benefit.
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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