Mrs. Katson 64-year-old obese woman with bilateral knee osteoahritis. She describes pain most days and limiting pain at least 2 days per week. She has tried activity modification (walking less) without success. All of the following therapies have been shown to be efficacious EXCEPT:
Acetaminophen Glucocoicoid steroid intra-aicular injections Glucosamine-chondroitin Total joint ahroplasty