What Happens When Smokers Stop When a Smoker Stops Smoking Within 20 minutes of smoking that LAST cigarette, the body begins a series of changes that continues for years. 20 Minutes Blood Pressure drops to normal. Body temperature of hands and feet increases to normal.
Pulse rate drops to normal.
8 hours Carbon monoxide level in blood drops to normal. Oxygen level in blood increases to normal. 24 Hours Chances of a heart attack decreases. 48 Hours Nerve endings start regrowing. Ability to smell and taste is enhanced.