This paper presents the follow-up study of 31 sexual offenders with diminished criminal responsibility or irresponsibility who were treated with Androcur (cyproterone acetate, CPA) in depot injection form connected with psychotherapy during and after their legal psychiatric hospitalisation. There were paedophiliac, exhibitionistic, hetero-sexual aggressive, and mixed sexual deviant acts. 30 patients were visited by the author in their environment, 1 patient had died. Half of the patients had a hetero-sexual relationship. 3 patients had children. 28 of the 31 patients were free. After the treatment with CPA 2 kinds of relapses could be distinguished: homologue r. (4 pat.) and residual r. (5 pat.). As to the duration of the treatment after discharge, 2 groups of patients can be distinguished: 1 group needed Androcur for a comparatively short time (up to c. 3 years), the other group for a longer time (up to c. 5 years). The anti-androgenic treatment was accompanied by psychotherapy and social therapy as well as during the hospitalisation and after discharge. The mutual effect of Androcur and psychotherapy was successful as is to be seen by the final result of this follow-up study.