Introduction & Objective: Substance abuse is believed to be one of the greatest social, economical ,and cultural problems all over the world and it is commonly observed among all social classes especially among mental disorder patients. Substance abuse can influence on the receptive-mental states such as mood and on the external visible activities such as behaviors. The aim of this study is to survey the frequency of Substance abuse in hospitalized mental-psychic patients in psychiatric ward of Farshchian hospital in Hamadan.

Materials & Methods: In this descriptive and retrospective study, available sampling method was used along with examining filed records in which the records of 400 hospitalized patients (293 men and 107 women) from September 2000 to 2001 were checked and required data such as demographic information, infliction duration, substance abuse duration, psychiatric diagnosis were extracted and registered. The data were analyzed with descriptive statistical methods.

Results: About half of the hospitalized patients in the psychiatric ward had simultaneous substance abuse. Men had substance abuse more than women and the youths aged 20-39 more than the other groups. The study showed that widowing had positive relationship and higher education negative relationship with substance abuse.

Conclusion: Mood disorders with 90.53%, schizophrenia with 8.29%, and other diagnostics with 1.18% were observed in persons with substance abuse and these diagnostics in non substance abuse persons were 79.22% ,11.26% and 9.52% respectively.