@loh I am close to stopping, too, because of the pain every evening. It's about a 6 or7 on the old pain scale...tough to ignore. Can't sit and watch TV with my husband; can't get comfortable no matter what I do. I am using Naproxen for my messed up back, but it doesn't do anything for the aches in the evening. How long did you have the pains before you quit? Does it ever improve if a person hangs in there?