I am a principal of the nova-Institute, Hürth (near Cologne), Germany, and chairman of the German Association for Cannabis as Medicine (ACM). I´m working as a medical doctor in private practice and most patients seek a treatment with cannabis or cannabinoids. I have been a key team member to several efforts on cannabis policy in and outside of Germany, including the medical use of cannabis and cannabinoids, the potential impacts of THC residues in hemp foods, and the issue of cannabis and driving. I am editor of “Cannabis and Cannabinoids. Pharmacology, Toxicology and Therapeutic Potential”, published in German, English and Spanish, and “Cannabis, Straßenverkehr und Arbeitswelt” [Cannabis, Driving and Workplace] in German, and author of “Hanf als Medizin [Hemp as Medicine], published in several languages including French and Spanish.