24 hours Carbon monoxide will be eliminated from the body. Lungs start to clear out mucus and other smoking debris. There is no nicotine left in the body. Ability to taste and smell is greatly improved. 72 hours Breathing becomes easier.
Bronchial tubes begin to relax and energy levels increase.
2 - 12 weeks Circulation improves. 1 year Risk of a heart attack falls to about half that of a smoker. 10 years Risk of lung cancer falls to half that of a smoker. 15 years Risk of heart attack falls to the same as someone who has never smoked. Withdrawal symptoms Withdrawal symptoms are the physical and mental changes that occur following interruption or termination of drug use.