Fig. 3
Subject 104. The levels of self-assessed impairment and the presence or absence of HGN are shown prior to and after smoking or vaporization of cannabis and hemp-derived Δ8-THC. Evaluation time points for HGN and self-assessed impairment differed following smoking of ∆9-THC cannabis and vaporization of ∆8-THC. HGN = horizontal gaze nystagmus