Due to the recurrent chronic nature of tobacco dependence, health care professionals should know the most common reasons for relapses and offer smokers who have stopped smoking a preventive treatment. In our setting, some authors state that the main causes for which smokers relapse are the negative emotional states and social pressures. Among the prevention strategies of relapse are providing the patient information, reinforcing his/her decision to stop smoking and helping the patient identify and face the danger situations for the maintenance of abstinence.