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Published Online:https://doi.org/10.1176/ajp.127.9.1134

Twelve heavy and 12 casual users of marijuana generally found the experience to be a pleasurable one. In contrast to casual smokers, heavy users of marijuana tended to use multiple drugs and demonstrated a significant incidence of psychic dependence on marijuana. Their search for insight or for a meaningful affective experience colored their motivation for drug use. Experience with multiple drugs was also associated with poor social and work adjustment; goal-directed activity and ability to master new problems were diminished.

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