Behavioral effects induced by intravenous administration of morphine at 0.3, 0.6, 1.2, and 2.4 μg/kg and fentanyl at 5, 10, 20, and 40 μg/kg were evaluated in dogs and cats. In dogs, fentanyl and morphine depressed activity and level of consciousness in a dosedependant manner. In cats, higher doses of fentanyl stimulated activity temporarily, but excitement, so-called "opioid mania," was not observed. Morphine induced distinctive behavioral changes characterized by sitting with fixed staring, and "opioid mania" was not observed in cats. © 2012 The Japanese Society of Veterinary Science.
CITATION STYLE
Kamata, M., Nagahama, S., Kakishima, K., Sasaki, N., & Nishimura, R. (2012). Comparison of behavioral effects of morphine and fentanyl in dogs and cats. Journal of Veterinary Medical Science, 74(2), 231–234. https://doi.org/10.1292/jvms.10-0565
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