physically no, there's not addiction, maybe some minor side effects, if you are a heavy daily smoker and stop cold turkey for a week, like a headache or something, but mostly its all gonna be a psychological addiction. Your brain knows you like being high, and it's your mind telling you to smoke again. It can be a very hard thing to go against what your brain is telling you, but it's all in your head and can be overcome. I think if a person is worried about being addicted and really wants to quit, they should be prepared for some battles with self-control, and will power, and the head trips that are gonna come from not smoking, but nothing physical. Even if a person should find them self unable to maintain the self-control and will power to quit when they want or need to, there is counseling for that these days and if the person is willing to make an effort should be much easier than quitting something that is physically addictive such as alcohol, tobacco, or unmentionables.