Nicotine is a psychoactive compound generates q dependence. Compulsive use. Psychoactive effects: feeling of well being to abolish abstinence, perceptions of improved memory and learning, neural stimulation. Positive reinforcing effect. Euphoric effects. Psychological dependence process faster, reaffirmation of personality. Chronic intoxication or dependence: is nicotine dependence of q produces selective, it does, even, q smokers are addicted to a certain taste, smell and kind of snuff. The circle of release of dopamine-self-management of drug-release of dopamine takes place in the nicotine, like q in other substances such as heroin and cocaine.