I have a problem with a knee and hip in cold and damp weather so I keep anti informatory nappersen on hand and that works for that problem but a few years ago I had a problem absolute terrible pain so I went to see my fishing buddy who is a chiropractor it took him about 60 seconds to tell me to go my gp doctor ask him to prescribe a muscle relaxer well I did and he did and after about 3 hrs. after taking the muscle relaxer I felt fine and have ever since......ted