Brain Stimulation Could Help Smokers Quit for Good, Study Finds

Quitting smoking remains one of the hardest challenges for millions, with fewer than one in ten achieving long-term success using medication and counselling. Now, a new clinical trial suggests a noninvasive brain stimulation technique could help tip the balance in favour of self-control. The study focused on repetitive transcranial magnetic stimulation (rTMS), a method already approved by the FDA for treating depression. Researchers used brain imaging to tailor magnetic pulses to each participant’s unique brain structure. By targeting the dorsolateral prefrontal cortex (DLPFC), they aimed to strengthen the brain’s weakened control system.

Participants who received DLPFC stimulation cut their smoking by more than 11 cigarettes a day. This was far greater than reductions seen in placebo or reward-dampening groups. The drop in smoking also matched lower self-reported cravings and reduced carbon monoxide levels, a key marker of tobacco use. Brain scans showed that boosting the control system naturally dampened the overactive reward system. Activity increased in the prefrontal cortex while decreasing in reward-linked areas like the orbitofrontal cortex. Though rTMS is already used in some smoking cessation programmes, this precision approach is still undergoing larger trials to confirm long-term quit rates.

The findings suggest rTMS could offer a new tool for smokers struggling to quit. By rebalancing brain activity, the technique may help reduce cravings and physical dependence. Further trials will determine whether these effects last over time.