Hi I am taking tramadol 50mg, I was taking 2 three x a day now I am taking 1 three times a day. My question is it safe for me , I have real bad pain in my knees and just my whole body. I am 72 years young, and have been told that I had chf. Right now that is under controled. I am getting ready to have knee replaced on my left knee. I just want to take a safe pill.