"i use lidoderm patch for upper back pain spasums. the patch works well for this type of pain. i also found that the patch works wonderful for sex. very seldom can i stick around long (about 30 min) enough for my wife to climax. however, using the patch about 1 hour before sex dulls the sensitivity, which allows me time for her to reach the big &quot;0&quot;.  happy wife happy life!"