Dose range finding study for the efficacy of meloxicam administered prior to sodium urate-induced synovitis in cats
Version of Record online: 14 JUN 2011
© 2011 The Authors. Veterinary Anaesthesia and Analgesia. © 2011 Association of Veterinary Anaesthetists and the American College of Veterinary Anesthesiologists
Veterinary Anaesthesia and Analgesia
Volume 38, Issue 4, pages 394–406, July 2011
How to Cite
Carroll, G. L., Narbe, R., Kerwin, S. C., Taylor, L., Peterson, K. and Hartsfield, S. M. (2011), Dose range finding study for the efficacy of meloxicam administered prior to sodium urate-induced synovitis in cats. Veterinary Anaesthesia and Analgesia, 38: 394–406. doi: 10.1111/j.1467-2995.2011.00621.x
- Issue online: 14 JUN 2011
- Version of Record online: 14 JUN 2011
- Received 24 April 2009; accepted 19 June 2010.
- nonsteroidal anti-inflammatory drug;
Objective To determine the lowest efficacious dose of oral meloxicam for relieving pain in cats with a sodium urate (SU)-induced acute inflammatory synovitis.
Study design Randomized, blinded, controlled, and four-way crossover study.
Animals Eight surgically neutered cats (four males, four females) paired according to sex.
Methods Each pair of cats was treated with 0 (placebo), 0.025, 0.05, or 0.075 mg kg−1 oral meloxicam once daily for 4 days prior to injection, into alternating stifles, of 1 mL of 20 mg mL−1 SU crystals, beginning with the right stifle. Each cat received each of the four treatments, separated by at least 21 days. Analgesic efficacy was evaluated based on objective (e.g., pressure mat data total force, contact pressure, and contact area) and subjective (e.g., scores for Analgesia Scale [AS], Lameness Scale [LS], and Visual Analog Scale [VAS]) outcome measures for pain assessment. All outcome measures were recorded before and during 30 hours after SU injection. The pre-defined primary outcome measure was the area under the response–time curve (AUC0–30 hours) of the total force of the injected limb. Data were analyzed by analysis of variance. A sequential test procedure was applied and the test sequence stopped in case of a nonsignificant result.
Results Meloxicam at doses of 0.05 and 0.075 mg kg−1 day−1 PO was significantly different from placebo for the pre-defined primary outcome measure (i.e., AUC0–30 hours of total force). All tested meloxicam doses were lower than placebo for the subjective outcome measures (i.e., AUC0–30 hours of AS, LS, and VAS).
Conclusions and clinical relevance The lowest efficacious dose of meloxicam for relieving pain in cats with an SU-induced synovitis was 0.05 mg kg−1 day−1 PO according to the pre-defined primary outcome measure. However, lower doses may also be effective as seen in the subjective outcome measures.