"i take diclofenac for chronic back pain. i take one diclofenac every 12 hours and it is very effective.  i had mild dizziness and upset stomach early in treatment but now have no side effects at all.  when my back gets bad, i still take muscle relaxers, narcotic pain relievers, and chiropractic treatment (when i can afford it), but diclofenac helps me manage things so as to reduce the need for stronger medicines."