ackground: In recent years, there has been an increasing interest in performing research on drug use and sex work among at-risk women. Although there is a well-documented literature of the initial reasons associated with drug use and sex work among women, there is, however, a paucity of information in this area in Iran. Objectives: This study aimed to explore the initial reasons associated with drug use and sex work in a group of female treatment seekers, who presented health-related...