On 10th of March 2017 a new law came into force that allows German doctors to prescribe medicinal cannabis flowers or cannabis extracts in case of lacking an alternative treatment. Readily prepared medicinal products like Sativex® and Canemes® as well as the formulated drug Dronabinol can still be prescribed.
The issue of whether or not patients on medicinally prescribed cannabis are fit to participate in public traffic was raised in January 2018 in Goslar at the 56th “Deutscher Verkehrsgerichtstag” (German congress about traffic law). There was general support for the idea that the driving license authorities should have the right to request the submission of a medical report in order to evaluate the ability of driving. In addition, a medical psychological assessment (MPA) can be required.
However, according to §24a StVG paragraph 2 clause 3, the proper application of THC as medicine does not constitute a misdemeanour according to §24a StVG.
The quantitative differentiation of THC and its metabolites 11-hydroxy-Δ9-THC and 11-COOH-THC (THC carbon acid) as well as the presence or lack of CBN (Cannabinol), CBD (Cannabidiol), and THC-A (Δ9-THC-acid) can be of importance for the distinction between therapeutic and illegal use of cannabis. Procedures for the detection of CBN and CBD in blood/serum are already established in our laboratory.