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1 July 2008 Immobilization of Black Bears (Ursus americanus) with a Combination of Butorphanol, Azaperone, and Medetomidine
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Abstract

Sixteen captive and five free-ranging black bears (Ursus americanus) were immobilized with a combination of butorphanol, azaperone, and medetomidine (BAM). The BAM drug combination was premixed using 0.5 ml butorphanol (30 mg/ml), 0.25 ml aza-perone (50 mg/ml), and 0.25 ml medetomidine (20 mg/ml) per milliliter to yield a final mix of (15 mg butorphanol 12.5 mg azaperone 5 mg medetomidine)/ml. This combination, dosed at 0.4 ml BAM/∼23 kg estimated body weight, provided a mean induction time of 10 min (95% confidence interval [CI] = 2 min), consistent anesthesia without apparent adverse effects, and smooth recovery (mean = 15 min, 95% CI = 4 min) after antagonism with atipamezole (5 mg/mg medetomidine) alone or in combination with naltrexone (5 mg/mg butorphanol). Based on our initial observations, BAM appears to be a reversible and accessible drug combination for immobilizing black bears that merits further evaluation for field use.

Atipamezole, azaperone, black bear, butorphanol, chemical immobilization, medetomidine, naltrexone, Ursus americanus.

Wolfe, Goshorn, and Baruch-Mordo: Immobilization of Black Bears (Ursus americanus) with a Combination of Butorphanol, Azaperone, and Medetomidine
Lisa L. Wolfe, Catherine T. Goshorn, and Sharon Baruch-Mordo "Immobilization of Black Bears (Ursus americanus) with a Combination of Butorphanol, Azaperone, and Medetomidine," Journal of Wildlife Diseases 44(3), (1 July 2008). https://doi.org/10.7589/0090-3558-44.3.748
Received: 14 November 2007; Published: 1 July 2008
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