The problem of drug abuse is of interest to many sciences, departments and public institutions. Despite the passage of time addiction is one of the most important and still unresolved social problems. The study we embarked on is of the descriptive and explanatory character. Describing those addicted to psychoactive agents we decided to search for answers to the questions: what led young people to drug initiation, what is the context of being a drug addict, and what are the relationships between the variables describing the dependence of those surveyed. Furthermore, taking the analysis and description of the results we want to determine the extent of drug-specific behaviors being linked to the socio-demographic characteristics such as gender, age or education. The group studied were 100 HIV-infected patients treated at the Regional Infectious Diseases Hospital in Warsaw. The research was conducted from June to October 2008.