Ikke i følge wikipedia:


Cannabis is detectable in the blood for approximately 12–24 hours, with heavy/frequent use detectable in the blood for up to 7 days.[19] Because they are invasive and difficult to administer, blood tests are used less frequently. They are typically used in investigations of accidents, injuries and DUIs.

I urin kan det spores i mange måneder. Så det er nok du som bommer