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Representative subjective ratings of drug effect as a function of number of active puffs and time as measured by the SE-VAS (0 mm = not at all; 100 mm = extremely). Data are presented as average group values for each post-smoking time point (± SEM). Active marijuana increased subjective ratings (0 puffs < 2, 4, or 6 puffs; p ≤ .001), but not dose-dependently.
