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. Author manuscript; available in PMC: 2011 Oct 19.
Published in final edited form as: Clin Chem. 2009 Oct 15;55(12):2180–2189. doi: 10.1373/clinchem.2008.122119

Fig. 1. Free plasma THC, 11-OH-THC, and THCCOOH concentrations in 6 daily cannabis users before and after first 20-mg oral THC dose (day 1) (panel A) and up to 22.5 h after 7 days of continuous oral dosing (days 8 and 9) (panel B).

Fig. 1

Blood was collected on admission, 12.5 and 19.5 h later, and multiple times after first and last dose. *, day 9.