I got a prescription from my doctor. It really helped. I only have to take it in the really cold and rainy weather. I take one 10mg daily. I have heard that it is the same as Vioxx, so I am very leary about taking it. I am trying to only take it when I really and truly am desperate for relief. I had tried Vioxx and Celebrex with no help, so I can say that it really does help. My doctor monitors my liver enzymes closely, because as I understand it can have an adverse affect. Hope this helps.