DocJohn
Try a different brand and make sure it is Glucosamine Sulfate (500mg) with MSM (500mg)- 'Natrol' is a good brand. Need to take 3 times daily. The glucosamine helps rebuild cartilage and the MSM also acts as a pain reliever. But need to tke for about a month to feel results. Meanwhile, Alleve, or any store brand naprosyn will help with immediate relief. Best Wishes - John