Intra-articular rimexolone in the rheumatoid knee: a placebo-controlled, double-blind, multicentre trial of three doses.

One-hundred and thirty-seven patients with classical or definite rheumatoid arthritis, involving at least one knee joint, were randomly allocated to a single intra-articular injection of 10, 20 or 40 mg of rimexolone (Org 6216) or placebo. The follow-up period was 84 days, during which clinical and laboratory assessments were done. Clinical improvement of the treated knee joint was measured by the following variables: pain, tenderness, morning stiffness, swelling, range of movement and walking ability. Placebo response was considerable. However, clinical improvement with rimexolone at 20 mg and 40 mg was significantly superior to placebo for most of the variables, whilst with the 10 mg dose only reduction of tenderness was significantly superior. The duration of improvement was longest with 40 mg of rimexolone. One single, intra-articular injection of this dose into the affected knee joint provided significant reduction in pain, tenderness and stiffness and improved the range of movement and walking ability for a period of 8 to 12 weeks.