text: Nicotine leaves the body in 2-3 days <depending on nicotine levels> ...  Typically if you can make it a year without smoking then you've 90% quit for life.\n\n20 Minutes: Blood pressure decreases-Pulse rate drops-Body temperature of hands and feet increases.\n\n8 Hours: Carbon monoxide level in blood drops to normal-Oxygen level in blood increases to normal <if no lund disease> \n\n24 Hours: Chance of a heart attack decreases.\n\n48 Hours: Nerve endings start regrowing-sense of smell and sense of taste improve <this sounds great but SUCKS ... there's way too much out there that should NOT be smelt!!!>\n\n2 to 3 weeks: Circulation improves-Walking becomes easier-Lung function improves.