Social behaviour of drug addicted patients is a key factor in understanding and controlling addiction problem. This study is conducted to investigate the social characteristics of 211 drug addicted males referred to addiction treatment centres in Yasouj, Iran.

More than 80% of participants were smokers among which 40% smoked their first cigarette at about age 14 or younger. Among the respondents 42.8% and 24% had have smoker friends or relatives respectively. 48.7% reported having at least one failed class during their compulsory education. Among the respondents 52.9% had at least one criminal record.

Results suggested smoking as an early and highly common behaviour during drug addiction during adulthood. Moreover, a significant number of the participants had smoker friends or relatives which could act as encouraging and facilitating factor to become addicted. Educational failure was common among addicted males. The above factors may be considered as predicting factor for later drug addiction.