Repeated failures to quit smoking are not a sign of weak willpower. Experts increasingly argue that smokers' brains have already had their reward circuits rewired by nicotine.
Nicotine Boosts Dopamine, Reshaping the Brain's Reward Circuit
According to the medical community on the 26th, Professor Kim Dai-jin of the Department of Psychiatry at Seoul St. Mary's Hospital, Catholic University of Korea, explained that smoking should be understood not as a simple lifestyle habit but as a nicotine dependence disorder linked to changes in the brain's reward circuit.
Nicotine reaches the brain quickly after smoking, stimulating dopamine release and producing a temporary sense of calm and improved concentration. But because these effects fade quickly, smokers reach for another cigarette, and dependence deepens with each repetition.
The intense craving for a cigarette under stress is also tied to nicotine withdrawal. In fact, many smokers light up again to ease withdrawal symptoms such as anxiety, restlessness, reduced concentration and irritability.
Withdrawal Peaks on Days 2-3, Compounded by Habit
Withdrawal symptoms peak on the second or third day after quitting. This is the scientific basis for why even the firmest resolve so often collapses within three days. Symptoms can persist from two to three weeks, and in some cases for several months.
Habit is also cited as a structural factor blocking smoking cessation. The developing brain is highly sensitive to nicotine stimulation, meaning even brief periods of smoking can raise the risk of addiction and lead to reduced learning concentration and impulse-control problems. The earlier one quits the better, but for those with a high level of nicotine dependence, succeeding alone is far from easy, experts say.
Professor Kim stresses that the most important thing is a shift in perception — viewing nicotine dependence not as a matter of willpower but as a disease requiring treatment. Quitting smoking, he urges, is not a problem to be solved by personal determination alone; it is a health management process whose chances of success rise when proper treatment and support from those around the smoker come together.
The Ministry of Health and Welfare currently offers free national smoking cessation support services to smokers determined to quit, including smoking cessation clinics at public health centers and smoking cessation treatment at hospitals and clinics. The 12-week smoking cessation treatment provided at hospitals and clinics carries no out-of-pocket cost if the entire program is completed.
Voices are growing that, rather than struggling to quit by willpower alone, it is time to make use of the support system the government has put in place.
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