Nicorette 4 mg Gum should be chewed slowly according to the instructions. The strength of gum to be used will depend on the smoking habits of the individual. In general, if the patient smokes 20 or less cigarettes a day, 2mg nicotine gum is indicated. If more than 20 cigarettes per day are smoked, 4mg nicotine gum will be needed to meet the withdrawal of the high serum nicotine levels from heavy smoking. Nicorette 4mg Gum should be used whenever the urge to smoke is felt or to prevent cravings in situations where these are likely to occur.