• G W Williams, R C Hubbard, S S Yu, W Zhao, and G S Geis.
• Division of Rheumatology, Scripps Clinic, La Jolla, California, USA.
• Clin Ther. 2001 Feb 1; 23 (2): 213-27.

ObjectiveThe purpose of this study was to compare the efficacy and tolerability of a celecoxib 200 mg QD regimen with a 100 mg BID regimen in patients with osteoarthritis (OA) of the knee.MethodsPatients enrolled in this prospective, double-blind, placebo-controlled, parallel-group, multicenter study were randomly assigned to receive celecoxib 100 mg BID, celecoxib 200 mg QD, or placebo for 6 weeks. Assessments of OA severity (Patient's and Physician's Global Assessments of Arthritis, Patient's Assessment of Arthritis Pain-Visual Analog Scale, Lequesne Osteoarthritis Severity Index, and the Western Ontario and McMaster Universities Osteoarthritis Index) were performed at baseline and at week 2 and/or 6. Patients who discontinued treatment underwent assessments at the time of withdrawal from the study.ResultsOf the 718 patients enrolled, 243 received celecoxib 100 mg BID, 231 received celecoxib 200 mg QD, and 244 received placebo. For all measures of efficacy, at all assessments, improvements from baseline in both celecoxib groups were superior to that seen in the placebo group (P < 0.05). No significant differences in efficacy between the celecoxib groups were observed. The overall incidence of adverse events was similar in the 2 celecoxib treatment groups.ConclusionsDosing regimens of celecoxib 200 mg QD and 100 mg BID are equally effective and well tolerated in patients with OA of the knee. The availability of 2 effective regimens provides patients and physicians with increased flexibility in the selection of an appropriate dosing regimen for celecoxib therapy.

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