I used it to quit smoking, doesn't matter why it worked, it just did. As soon s my husbands recovery from his surgery ( non- PD) I am going to try it on my back ( also non PD) I think it was Dennis Green , an ex list member who tried it and did not have good results. We have a friend , also, non PD, who had excellent results when he used it for muscle pain. Who know, it surely beats taking more medicine. Good luck to those who try. Nita