Robenacoxib vs. carprofen for the treatment of canine osteoarthritis; a randomized, noninferiority clinical trial.

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Reymond N, Speranza C, Gruet P, Seewald W, King JN

Robenacoxib vs. carprofen for the treatment of canine osteoarthritis; a randomized, noninferiority clinical trial.

J Vet Pharmacol Ther. 2012 Apr;35(2):175-83. doi: 10.1111/j.1365-2885.2011.01297.x. Epub 2011 Apr 12.

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21480932 [ View in PubMed
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Abstract

Robenacoxib is a member of the coxib class of nonsteroidal anti-inflammatory drugs (NSAID), with high selectivity for the cyclooxygenase (COX)-2 isoform of COX. In this study, the efficacy and tolerability of robenacoxib were compared with those of carprofen in canine osteoarthritis in a multi-centre, prospective, randomized, blinded, positive-controlled noninferiority clinical trial. Both drugs were administered orally once daily at recommended dosages: robenacoxib at 1-2 mg/kg (n = 125 dogs) and racemic carprofen at 2-4 mg/kg (n = 63 dogs) for a total of 12 weeks. The efficacy of the test compounds was assessed by veterinary investigators and owners using numerical rating scales at baseline and days 7, 14, 28, 56 and 84. In both groups, all scores were significantly (P < 0.0001) improved compared with baseline at all time points (days 7-84). Robenacoxib had noninferior efficacy to carprofen for the primary endpoint, the global functional disability, both for all dogs and for the subgroup of dogs in which robenacoxib was not administered during meals. Noninferiority was also demonstrated for three of six veterinary investigator secondary endpoints and four of six owner efficacy endpoints. For haematology and clinical chemistry variables, there were some significant differences from baseline levels but no differences between groups. There were no differences between groups in the frequencies of adverse events, which were reported in 46% dogs with robenacoxib and 52% with carprofen (P = 0.44), which were most frequently mild events affecting the gastrointestinal tract. In conclusion, noninferior efficacy and tolerability of robenacoxib compared with carprofen was demonstrated in dogs with osteoarthritis.

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