Sample of alcohol and opiate female addicts (30 patients in each group) plus control group (30 women) with no psychiatric diagnosis were questioned with Defense Style Questionnaire - DSQ 40 (Andrews, Singh, Bond, 1993).

There were found no statistically relevant differences between two experimental and one control group concerning mature defense mechanism use. Significant differences were found in neurotic and immature defense mechanism use: alcohol addicts use prevalently neurotic mechanisms and immature mechanisms prevail among opiate addicts.

In our research mostly used neurotic defense mechanisms by alcohol addicts were: pseudoaltruism, idealization, and undoing. The mostly used immature defense mechanisms among opiate addicts were: phantasy, isolation, devaluation, denial and splitting.