pain
"Yes, I have experienced a side effect of Ultram which is preventing me from sleeping. It has 50 mg 1 or 2 tablets every six hours as need. I have tried them from my doctor and I have been up all night, I had a total left knee replacement revision on the 8th of June, 2011. I was told also to take 1 Ambien (10 mg) and 1 extra strength Tylenol at the same time. I did and all I did was cat nap and was always awake when the daylight came up. I need REST!"