Abstract
The theory of functional equivalence allows us to look at the problem of needs and their satisfaction from a different perspective. This theory allows better understanding of the causes of various addictions, including dependence on nicotine. The role of emotional stress as an indicator that equivalence has not been established is emphasized. The presence of stress means that the body is in the process of searching for "channels" to form the equivalence of the response necessary to ensure the functioning of the body. One of these "channels" may be the development of addictive behavior, such as smoking, for example. Stimulating motivation to quit smoking and using the right psychotherapy can make smoking cessation sustainable and cost-effective.