How Do I Know I'm Addicted

I've been on painkillers for about three years now. But, in addtion to wanting them....I also need them now because I had a major back surgury a year ago. Now what do I do!? I know it is affecting me and my question is...other than my mood, what are they doing to my body?
Rainshower,

It all depends on what your taking.. aome pain pills contain tylenol, and at high doses can have very bad effects on your liver.

Regards,
Tom
If you think your addicted you are