With regard to our mobile society on the one hand and the problems of drug consumption among younger people on the other hand we wanted to enlighten the special field of designer drugs , participation in traffic and legal punishment. All analyses of blood and urine samples with positive results for Ecstasy in the years 1994 to 1997 were collected. The use of Ecstasy was examined in a total amount of 150 cases in the 4-year-period. Active road use could only be determined in 33 cases or 22 per cent. Most of them were male, only three female, and they were aged 24 ± 5 years. The possibility of detection is discussed together with the German legislation and its possible effect on prevention of drug use in combination with driving.