For many smokers, an effective method for quitting smoking will include a combination of emotional support from others, a change in their usual habits, and a form of therapy that includes the use of nicotine substitutes. When smokers try to cut back or quit smoking, the absence of nicotine in their system leads to withdrawal symptoms that many smokers believe is the reason that they cannot quit. Dr. Diennet's nicotine replacement formula reduces the symptoms of nicotine withdrawal during the quit process, allowing the smoker to concentrate on the psychological aspects of quitting smoking.