I have always naively assumed that addiction and physical dependence were synonymous, however, I was very wrong. Addiction is categorized by someone using drugs compulsively despite the negative consequences. It is life interfering, and there is tolerance and withdrawal. Physical dependence, on the other hand, is the categorization of the nature in which the body becomes adapted to the drug, forms a dependence, and actually acquires a physical need for it. I had always assumed that being "addicted" and having a "physical dependence" were of the same token, but I guess there are different definitions. Were you aware of this? To be honest, I am not so sure I still see the difference!