Abstract
The importance of methadone substitution of heroin addicts with regard to driving a car is increasing in the Federal Republic of Germany. Making use of the driving license may be a prerequisite of the intended integration in the society e.g. in a new start of a job. In the paper the experimental studies regarding the ability to drive under methadone are reviewed, the results achieved are compared and assessed. The consequences for re-issuing a driving license are described and a new formulation of adequate criteria is outlined. (A)