This review analyzed substance abuse in schizophrenic patients. Results indicate that substance-use disorders occurred most commonly in males, & were more prevalent in the young. There was a higher risk for suicide in this population. One study presented found that schizophrenic patients with substance-use disorders reported suicidal ideation more frequently (75%) than past users (28%) or non-users (37%). In a logistic regression model, depressive psychopathology & current comorbid substance-use disorder predicted suicidal ideation. (44 refs) (SC)