Abstract
The local tolerability of lornoxicam (Xefo®) after single and repeated intraarticular administration was assessed in the rabbit and compared to established standard therapies (hyaluronic acid—Synvisc® and the glucocorticoid triamcinolone—Triam®), and the results are discussed in the context of the literature. Two local tolerance studies were performed using five male rabbits per group. Lornoxicam and competitor products were administered into the right knee joint in a volume of 500 μL. The contralateral left knee joint of the same animal was used as the control and was injected with water for injection. Three out of five animals were killed 72 h after the last administration, whereas the remaining two animals were subjected to a 2- or 6-week recovery period in the first and the second study, respectively. Findings revealed adaptive changes related to the mechanical irritation of the injection and to adaptive responses of the synoviocytes, but no signs of toxicity to bone or chondrotoxicity. Toxicokinetic analysis showed a fast and almost complete absorption of lornoxicam from the joints into the systemic circulation. As a conclusion, repeated intraarticular administration of lornoxicam was well tolerated in rabbits.
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The authors wish to thank Deborah Ockert for providing language help, and Martina Boehnk and Christoph Graff for technical assistance.
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Schroeder, S., Heuser, A., Tellmann, A. et al. Local tolerance of intraarticular administration of lornoxicam into the rabbit knee joint. Rheumatol Int 32, 2661–2667 (2012). https://doi.org/10.1007/s00296-011-2012-x
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DOI: https://doi.org/10.1007/s00296-011-2012-x