ABSTRACTUnderstanding the experiences of street addicted people can help clarify the process of engaging people with this social problem. This study aims to discover the challenges of drug-dependent street people by exploring their lived experiences. This study was conducted using content analysis of qualitative interviews with 22 street recruited from within compulsory drug treatment centers in Tehran. Participants were selected through purposive sampling and their experiences of homelessness and addiction were collected through a semi-structured interview. After analyzing the data, three categories and eight sub-categories were determined. The main categories included instability, social distrust, and economic vulnerability. Instability includes experiences such as rejection from their home, street attraction, and avoiding returning home. The social distrust theme consists of experiencing the stigma related to addiction and high-risk behaviors. The economic vulnerability encompasses gradual capital loss and weakening their work status in the context of a weak economic foundation. Dependent drug use added to those isolating experiences leads to weakened family ties, and social and economic interactions and finally results in being disconnected completely from the community mainstream.