Studie: Verbraucher zeigen trotz Rest-THC-Blutspiegeln keine Beeinträchtigung ihrer Fahrleistung am nächsten Tag

The headline is interesting but the operational point still seems to be that residual blood levels alone are a poor proxy for next day impairment. I would want to know sample size, dosing pattern and whether the driving task captured rarer attention failures before drawing policy conclusions.

I mean that makes sense as the metabolites are functionally inert, and unless you had a crazy high dose, the most significant effects of THC are done within about 4-5 hours. A trial of 12-15 basically has enough half lives going that there should be little active effect at all.

Am curious what their test dose was.