Marijuana is made from crushed leaves, flowers, and stems from the hemp plant, Cannabis sativa. Tetra hydrocannabinol, THC, is the active ingredient. Marijuana is also known as 'pot,' 'dope,' or 'reefer.'

Cannabis sativa

Effects on Consciousness

-Dreamy, carefree relaxation
-Expanded sense of space and time
-Vivid sensations
-Food cravings
-Subtle changes in thinking


-THC collects in fatty deposits of the brain and reproductive organs
-Research suggests that the endocannabinoid system interacts with the pleasure-producing actions of the endorphin and dopamine systems

Adverse Effects

-Moderate psychological dependence
-Decreased coordination

A 'joint,' a common way to smoke marijuana

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