PMID: 8944802Dec 1, 1996Paper

Safety and efficacy of 4-methylpyrazole for treatment of suspected or confirmed ethylene glycol intoxication in dogs: 107 cases (1983-1995)

Journal of the American Veterinary Medical Association
H E ConnallyD W Hamar

Abstract

To evaluate safety and efficacy of 4-methylpyrazole (4-MP) treatment in dogs and to determine clinical signs and outcome of, and clinicopathologic abnormalities in, dogs treated in early or late stages of ethylene glycol (EG) intoxication. Retrospective study. 107 dogs. For dogs treated with 4-MP, 1 of 2 dosage regimens was usually used: 20 mg/kg of body weight, IV, initially, 15 mg/kg 17 hours later, and 5 mg/kg 25 and 36 hours after the initial dose, or 20 mg/kg, IV, initially, 15 mg/kg 12 and 24 hours later, and 5 mg/kg 36 hours after the initial dose. Neither adverse clinical signs nor clinicopathologic abnormalities were associated with the administration of 4-MP except in 1 dog, which developed tachypnea, gagging, excess salivation, and trembling after the second dose of 4-MP was given. Ethylene glycol intoxication was confirmed in 37 dogs. Of these, 21 were azotemic or became azotemic within 18 hours after admission, and only 1 of the 21 survived. All 16 dogs that did not become azotemic survived. Median time from EG ingestion to treatment with 4-MP was 5 hours (range, 2 to 8.5 hours) for dogs that were not azotemic at admission and 14.5 hours (range, 8.5 to 38 hours) for dogs that were azotemic at admission. 4-MP was a ...Continue Reading

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