The aim of this study was to investigate which antihormonal treatment strategies are used in German forensic psychiatric institutions. Forensic clinics were asked about the number of treated patients. Four hundred seventy-four patients were committed for sex offences; 12% received either CPA (n = 29) or LHRH- agonists (n = 29). Differences in efficacy were small. Several side effects confirm the importance of a protocol for minimizing medical complications.