How long does it take for the effects of smoking to leave your system?

ANSWER: Once you smoke one time, you will never recover from smoking. this answer is ridiculous see below and for more info go to http://whyquit.com/whyquit/A_Benefits_Time_Table.html ..... * 20 minutes Your blood pressure, pulse rate, and the temperature of your hands and feet will all return to normal. * 8 hours Remaining nicotine in your bloodstream will have fallen to 6.25% of normal peak daily levels, a 93.25% reduction. * 12 hours Your blood oxygen level will have increased to normal and carbon monoxide levels will have dropped to normal. * 24 hours Anxieties peak and within two weeks should return to near pre-cessation levels. * 48 hours Damaged nerve endings have started to regrow and your sense of smell and taste are beginning to return to normal. Cessation anger and irritability peaks. * 72 hours Your entire body will test 100% nicotine-free and over 90% of all nicotine metabolites (the chemicals it breaks down into) will now have passed from your body via your urine. Symptoms of chemical withdrawal have peaked in intensity, including restlessness. The number of cue induced crave episodes will peak for the "average" ex-user. Lung bronchial tubes leading to air sacs (alveoli) are beginning to relax in recovering smokers. Breathing is becoming easier and the lungs functional abilities are starting to increase