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Synthetic insulin analogue
Dogs and cats
May Be Prescribed by Vets for:
Search for Available Dosage Forms
Glargine insulin is a synthetic insulin analogue that is used in human medicine as a long-acting, "peak-less" insulin. It is administered subcutaneously once a day in humans and maintains a constant systemic absorption profile for 24 hours. Additionally, a short-acting insulin may be used before meals to further optimize glycemic control.
Glargine insulin is completely soluble at a low pH. When it is injected subcutaneously it forms a microprecipitate in the subcutaneous space. This allows for relatively constant and prolonged absorption. Glargine insulin cannot be mixed with other insulin because it would change the pH and the mechanism of absorption.
Diabetes Mellitus is a relatively common metabolic disease seen in middle aged cats and dogs. Most dogs suffer from Type 1 diabetes, while cats usually have Type 2 diabetes. Type 3 diabetes may occur in either cats or dogs. In addition to treatment with insulin, the veterinary management of diabetes requires owner education, dietary management, and regular glucose testing. With appropriate management, most animals can live a normal lifespan.
In healthy cats, the duration of action for glargine insulin is 23 +0.9 hours. Diabetic cats may be maintained on once-a-day injection, although some cats may be better controlled with twice-a-day injection. It appears that glargine insulin is particularly useful in the treatment of the newly diagnosed, diabetic cat as some of these cats are able to achieve a diabetic remission.
Glargine insulin has not been as well studied in the dog as it has in the cat.
Hypoglycemia: The initial signs of hypoglycemia include nervousness, vocalization, anxiety, muscle tremors, ataxia, and pupillary dilation. The alert owner may be able to offer the patient some food or oral dextrose to counteract the hypoglycemia. Positive response should occur within one or two minutes. More severe signs of hypoglycemia include seizures, shock and coma. These animals require prompt veterinary intervention.
Overdose with insulin will lead to varying degrees of hypoglycemia. Description of mild hypoglycemia is included with the side effects. More severe hypoglycemia can lead to seizures, blindness, cerebral edema, permanent brain damage, coma, and death.
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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