[Legal medicine aspects of current abuse potential].

Abuse is defined as use of a thing, which deviates from the original use and its purpose resp. in qualitative as well as quantitative manner. The task of the forensic medicine is to evidence the abuse and the misused substance resp. in order to find a basis for the judgement of the ability of the offenders guilt. The potential of abuse of several psychotropic drugs and their proof with its possibilities and limitations are described.