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Marihuana effects on learning, attention and time estimation

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  • Human Pharmacology
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Abstract

Ten young, healthy male volunteers smoked a marihuana cigarette with 2.5% δ 9-THC and a THC-exhausted placebo cigarette. The marihuana administration was associated with an increase in heart rate, elevation of systolic blood pressure, conjunctival reddening and specific airway conductance increase; time perception and Automated Digit Symbol Substitution Test performance were impaired. Diastolic blood pressure and attention measured by the Continuous Performance Task were not affected.

The placebo preparation produced a subjective pleasant “high” but no physiologic effects nor performance change. The “high” induced by the active preparation was often rated as unpleasant.

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This work was supported by NIMH award number 5 R01 DA00067-03.

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Vachon, L., Sulkowski, A. & Rich, E. Marihuana effects on learning, attention and time estimation. Psychopharmacologia 39, 1–11 (1974). https://doi.org/10.1007/BF00421453

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  • DOI: https://doi.org/10.1007/BF00421453

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