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Effect of preoperative meloxicam or tolfenamic acid administration on stress and pain induced by surgical castration in piglets

Tolfenamic acid tended to be more efficient than meloxicam both during and post-castration.

24 May 2013
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Sixty-six piglets (5-6 days of age) were allotted into 4 groups in a way to test the effect of two non-steroidal anti-inflammatory drugs on stress and pain induced by surgical castration: castration (C); castration+tolfenamic acid (T); castration+meloxicam (M); simulation of castration (S).

M pigs spent more time during castration trying to escape than C and Tpigs (41±9 vs. 34±1%). T pigs spent less time crying than C pigs (52 ± 22 vs. 70 ± 20%). Vocalization of M pigs had a higher intensity (107 ± 4 vs. 103 ± 2 dB). The mean heart rates in the four groups of piglets were not significantly different. Plasma cortisol concentration measured 30 minutes post-castration in T pigs was higher than in S and M groups (20 ± 4 vs. 17 ± 0 μg/dl). However concentrations measured in C and S groups were not significantly different. Post-castration, S and T pigs tended to spend less time isolated than C pigs. More tremors and spasms were observed in M group than in S group. Tail movements in C pigs were observed more than in S and T pigs. M pigs tended to show more tail movements than T pigs.

Pre-emptive analgesia seemed to reduce stress and pain induced by surgical castration in piglets. Tolfenamic acid tended to be more efficient than meloxicam both during and post-castration.

J. Wavreille, M. Danard, V. Servais, T. Art, B. Nicks, M. Laitat. Analgésie préemptive du porcelet avant la castration : comparaison de l’effet de l’acide tolfénamique et du méloxicam sur la douleur et le stress. 2012. Journées Recherche Porcine, 44, 275-276.

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