The co morbidity of substance dependence and psychiatric disorders is common. This co morbidity complicates the diagnosis and treatment of both types of disorders and causes a lot of complications and bad consequences. There is a great deal of co morbidity between substance abuse, including alcohol, and other psychiatric disorders such as mood disorders, depression, anxiety disorders, schizophrenia, and personality disorders. The objective of this study is to estimate the prevalence of each substance dependence and its co morbidity with other psychiatric disorders because this co morbidity has many significant psychiatric and social problems.