I was rear-ended at 70mph while 14 cars down at a red light back in 2013. Mainly neck and arm issues, few epidurals in my neck, etc..... Now my herniated disc is acting up in my low back for the past 40 days. It is like a tooth ache from the back of my knee to the small of my back on the right side. I take acupuncture every two weeks to get it functional. Waiting for epidural in my back, slow boat to China with that. I can't take Naproxen after having boatloads stockpiled of it as I bleed internally from it. Just Tylenol as they try never to give you pain killers any more. How did it work for you?