pain
"My doctor prescribed ULTRAM ER 200 for lower back pain and sciatica.  I was taking 1 tablet twice a day.  For 2 or 3 days it seemed to work great.  Then I started having side effects.  I had mild dizziness and a slight upset stomach.  I took Ultram ER for a total of 9 days.  The dizziness became severe, I was lethargic but not able to sleep for more than 2 or 3 hours a night, and the nausea had increased.  I stopped taking ultram ER and it took 12 days for the side effects to subside.  The doctor said I had an allergic reaction to this medication."