The main objective of this investigation is to recognize the meanings and believes adolescents in socioeconomically situation of vulnerability have about psychoactive substances’ consumption. For this purpose a semi-structured interview was conducted with three students of a public school in Bogota with ages between 15-17 years old. As this investigation was made using a qualitative methodology the analysis was made from emergent categories. Based on what was found it was possible to conclude that the psychoactive substances’ consumption for the participants contributes to the constitution of their identity, it is understood from the fact that the consumption is naturalized in there families and peers environment, hence is characterized as a binding factor to their context. Further more, this study shows how the family, social and educational spheres are fundamental in the construction of the meanings and believes these adolescents have, as well as the beginning and the maintenance of the consumption.