Examine the Feasibility of a Standardized Field Test for Marijuana Impairment: Laboratory Evaluations


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Experimental: Regular Users

People who use marijuana regularly will be given a low dose THC marijuana, high dose THC marijuana and placebo marijuana, in a randomized order, at the five study visits.

Drug: Low Dose THC Marijuana

Dosing via vaporized marijuana using a lower concentration of THC, participants receive this dose on two of the five study visits.

Other Name: THC, Cannabis

Drug: High Dose THC Marijuana

Dosing via vaporized marijuana using a higher concentration of THC, participants receive this dose on two of the five study visits.

Other Name: THC, Cannabis

Drug: Placebo Marijuana

Dosing via vaporized marijuana with no THC, participants receive this dose on one of the five study visits.

Other Name: THC, Cannabis