Tramadol
"I have suffered from Fibromyalgia for 20 yrs, diagnosed 11 yrs ago. I have been on Tramal SR for the past 8yrs. It allowed me to keep working although I now take the maximum allowable daily dose and sometimes have to top up with ibuprofen or codeine. If I miss a tablet pretty severe withdrawal symptoms but without it I wouldn't still be able to work. It saved my sanity."