This laboratory study will employ a repeated measures experimental design to examine the effect of high (7.2% THC) and moderate (3.1% THC) dose of marijuana, relative to placebo, on alcohol craving and on behavioral economic measure of alcohol demand after exposure to alcohol cues, and on subsequent drinking in an alcohol choice task in which participants choose either to drink or receive monetary reinforcement for drinks not consume. The study will recruit 173 non-treatment seeking heavy episodic alcohol drinkers who smoke marijuana at least twice weekly.
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Alcohol Craving
Timeframe: T0: pre-smoking (-45 minutes) and post smoking at 12 mins (T1), 47 mins (T2), and 58 mins (T3), 116 mins (T4), 178 mins (T5) during the experimental session