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Am J Vet Res. 1981 Jan;42(1):41-4.

Cardiopulmonary effects of butorphanol tartrate in horses.

Abstract

The cardiopulmonary and behavioral effects of butorphanol were evaluated in pain-free adult horses. Butorphanol tartrate was administered IV in doses of 0.1, 0.2, and 0.4 mg/kg to the same horses on 3 separate occasions. There were no significant (P less than 0.05) changes in heart rate, mean and diastolic arterial pressure, mean and diastolic pulmonary arterial blood pressure, or cardiac output recorded in the horses given these doses. Systolic arterial blood pressure was significantly (P less than 0.05) increased in only the horses given the 0.2 mg/kg dose. Significant (P greater than 0.05) changes in electrocardiographic intervals, respiratory rate, arterial blood gas values, or pH were not recorded. Increasing IV doses of butorphanol resulted in varied behavioral changes, but were predominantly excitatory.

PMID:
7224316
[Indexed for MEDLINE]
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