I use them on my ribs and hands mostly. They are about 4x6 patches that stick to the skin and you use them 12 hrs on and 12 hrs off. As Karen said they do work better for pain that is close to the surface. I cut them in half for the arthritis in my hands. They numb enough to take the edge off the pain. I'm only allowed to use one at a time probably cause of other meds I'm on. I know some use two or three at a time. They are worth talking to your doc about.
I also use TENS unit for pain, it interrupts the pain signals to the brain. I use that for the deeper pain. I slept with the TENS on my ribs for several nights with the one I hurt before Christmas. It also stopped the muscle spasms I was having in my side. You can get one at some drug stores now I guess but I have not seen them. I got mine from MedicalProductsOnline.com I think is the name. With the TENS and 10 sets of extra pads it was about $100.00 but the pads last for a long time. It is something you can carry in your pocket and no one knows you have it on.
For those of us that can't take narcotics or chose not to there are somethings that help.
luv and hugs
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