• K Gottesdiener, T Schnitzer, C Fisher, B Bockow, J Markenson, A Ko, L DeTora, S Curtis, L Geissler, B J Gertz, and Protocol 007 Study Group.
• Clinical Pharmacology, Merck Research Laboratories, Rahway, NJ 07065, USA.
• Rheumatology (Oxford). 2002 Sep 1; 41 (9): 1052-61.

ObjectivesTo evaluate the clinical efficacy and tolerability of etoricoxib in the treatment of osteoarthritis (OA) of the knee and define the clinically active dose range for further clinical trials.MethodsThis two-part, randomized, double-blind, placebo- and active comparator-controlled trial was conducted in 617 adults with knee OA. In Part 1 (6 weeks), patients received placebo, etoricoxib 5, 10, 30, 60 or 90 mg q.d. In Part 2 (8 weeks), patients received etoricoxib 30, 60 or 90 mg q.d. or diclofenac 50 mg t.i.d., predetermined at Part 1 allocation. Efficacy and safety were evaluated. Primary efficacy end-points were the Western Ontario and McMaster's University Osteoarthritis Index (WOMAC) Pain subscale, Patient Global Assessment of Response to Therapy, and Investigator Global Assessment of Disease Status.ResultsAt 6 weeks, etoricoxib 5, 10, 30, 60 and 90 mg each demonstrated clinical efficacy superior to placebo. Maximal efficacy was seen with 60 mg. In Part 2, etoricoxib 30, 60 and 90 mg were generally similar to diclofenac. Patients receiving etoricoxib 30, 60 or 90 mg in Parts I and II had sustained effects over 14 weeks. All treatments were well tolerated.ConclusionsEtoricoxib 60 mg once daily showed maximal efficacy in treating OA in this study. Etoricoxib 5-90 mg once daily was generally well tolerated in OA patients for up to 14 weeks.

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