the first few times i smoked them after like a little i got really naucious but it goes away after you've done it for a little, and you never get it again from what i've found..my friend told me that his parents made him go to some thing to quit smoking and they said 3 in a row = addiction..i dunno about that, but i never let myself chain smoke more than 2 and if i have to go without smoking cigs for a day or more i havent had any withdrawl probs.