Clinical Efficacy and Tolerability of Cimicoxib in Dogs with Osteoarthritis: A Multicentre Prospective Study

Background: Cimicoxib is a coxib recently licensed in Europe for pain and inflammation associated with osteoarthritis (OA), and the management of perioperative pain due to orthopaedic or soft tissue surgery. Purpose: This prospective study was to complete the product information for the end users by providing additional scientific data obtained after a thirty-day treatment course of cimicoxib in dogs with OA, and to collect owners’ feedback. Data were collected from nine European countries with 492 client owned dogs recruited to the trial. Dogs were treated once daily with 2 mg/kg cimicoxib orally. Immediately before, at Day (D) 15 and D30 after the start of treatment veterinarians and owners scored body condition, appetite, locomotion, lameness, pain on palpation and manipulation of the joint and joint effusion (veterinarians) and dog demeanor and well being (owners). In a subset of dogs, serum urea (n = 191), creatinine (n = 184), AST (n = 141) and ALT (n = 174) were measured at day (D) 0 and D30. Statistical tests were carried out to detect significant changes in the clinical parameters with time. Results and Discussion: Veterinary and owner assessments were analysed from 236 and 215 dogs respectively. Improvements in locomotion, mobility, pain scores and dog demeanor and body condition were identified; outcome measures assessed by veterinarians continued to improve after 15 days of treatment up to the 30-day time point. At D30 a significantly higher number of dogs had an urea concentration superior to the upper limit of the reference range. However, there was no significant difference for creatinine, ALT and AST. Conclusions: A 30-day treatment course with cimicoxib improved locomotion and decreased pain scores in dogs with OA, with minimal adverse effects. These data, support pre-clinical data in dogs receiving cimicoxib and are useful for veterinarians making decisions about which NSAID to administer to dogs that require pain management for OA. Corresponding author.