I havent been able to put mine down since I started about 5 days ago. I was a pack and a half a day smoker. I think im inhaling even more nicotine now. I even feel a little light headed. Im thinking its just the novelty of it and Ill slow it down as time goes on. Im also assuming I would feel more uncomfortable symptoms before having any kind of a serious nic OD. But for 5 days straight I have been constantly vaping and feeling a little light-headed.