pain
"I have been taking Tramadol (200mg every 12 hours) for several years now for chronic back pain (the side effects of Polio). It only dulls the pain, but this helps me to get around from day to day. However, there have been a few side effects, such has headache, disturbed sleep pattern, excessive sweating.  I have been on various types of pain killers but this one seems to work the best for me. One warning, don't just stop taking this medication, the withdrawal effects are quite unpleasant."