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  • Title: Effect of butorphanol, pentazocine, meperidine, or metoclopramide on intestinal motility in female ponies.
    Author: Sojka JE, Adams SB, Lamar CH, Eller LL.
    Journal: Am J Vet Res; 1988 Apr; 49(4):527-9. PubMed ID: 3377314.
    Abstract:
    Effect of butorphanol, pentazocine, meperidine, and metoclopramide on jejunal and pelvic flexure myoelectric and mechanical activity in 4 female ponies was investigated. The agent to be tested or saline solution was administered IV at the start of a 6-hour recording trial. In the jejunum, duration between activity fronts of regular spiking activity, defined as the length of the migrating myoelectric complex (MMC), was measured. The average duration of the MMC during control trials was 150 +/- 46 minutes. The average duration of the MMC after meperidine, butorphanol, pentazocine, and metoclopramide administration was 295 +/- 70 minutes, 260 +/- 60 minutes, 275 +/- 60 minutes, and 163 +/- 64 minutes, respectively. Meperidine, butorphanol, or pentazocine significantly increased the MMC duration (P less than 0.05), and did not significantly alter the pelvic flexure activity. Seemingly, meperidine, butorphanol, and pentazocine inhibited cyclic myoelectric activity in the jejunum. Metoclopramide had no effect on jejunal or pelvic flexure motility.
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