I have used the peripheral nerve stimulator in my back for five days. While using it I found that I was able to do physical activity without pain. However, afterwards for one day, I would feel pain but then it would go away. I also noticed that I didn�t have to take the Vicodin as much. I took 2 less Vicodin per day and 2 less tramadol everyday. I have not lain in my bed in a year and a half. I sleep in a recliner.