Quality of life is defined from the economic sciences, as an effect of economic automatism and inequality in social development. In relation to people who consume psychoactive substances, it was determined that it radically affects the level and achievement of life, relationship, personal growth, physical well-being, safety, spirituality, environment, among others. Among the aims to highlight is to analyze the quality of life in drug-dependent adults, in addition, we seek to collect information about the quality of life in general and later focused on people addicted to psychoactive substances, to gather research in relation to drug dependence and to associate the QOL investigations in patients addicted to psychoactive substances. Therefore, it is established that there is a low level in the quality of life of this group of patients, due to the fact that such addiction affects several aspects, causing alterations in their behavior. In this way, the quality of life is determined by means of medical instruments that are used during clinical practice, in relation to people addicted to psychoactive substances, it is established that it has detrimental effects leading to the development of various psychiatric and behavioral disorders.