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  • Title: Cardiopulmonary effects of nalbuphine hydrochloride and butorphanol tartrate in sheep.
    Author: O'Hair KC, Dodd KT, Phillips YY, Beattie RJ.
    Journal: Lab Anim Sci; 1988 Feb; 38(1):58-61. PubMed ID: 3367623.
    Abstract:
    The cardiopulmonary, sedative and analgesic effects of butorphanol tartrate and nalbuphine hydrochloride were evaluated in six adult crossbred Dorset sheep (Ovis aries). The animals were divided randomly into two groups of three. The first group received butorphanol tartrate (0.5mg/Kg s.c.) followed in 3 days by nalbuphine hydrochloride (1 mg/Kg, s.c.). The second group received nalbuphine followed in 3 days by butorphanol. Cardiopulmonary parameters were evaluated at baseline (once the animal had accommodated to restraint); immediately following analgesic administration; and at 15, 30, 60, 90 and 120 minutes after analgesic administration. No significant changes (alpha greater than .05) from baseline were seen in any of the measured cardiopulmonary parameters from either the butorphanol or nalbuphine groups. Butorphanol produced the most dramatic analgesic and sedative effects with onset of both within 15 minutes of administration and peak effects occurring 30 minutes post injection. The degree of analgesia was diminished at 120 minutes while the sedative effect returned to near baseline by 90 minutes. The nalbuphine group also showed an onset of analgesia 15 minutes post injection reaching a peak effect after 30 minutes. However, onset of sedation occurred 30 minutes post injection achieving a peak effect at 60 minutes which was markedly less than that of butorphanol. As in the butorphanol group, analgesia was diminished at 120 minutes.
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