This course covers marijuana as a psychoactive substance that induces its effects by manipulating natural brain chemicals known as the endocannabinoids. The toxic and addictive impact results from the drug’s disruption of the natural endocannabinoids, one of our most widespread and versatile signaling molecules. The powerful video presentation by CNS Productions includes research by the scientists studying its effects on different physical, perceptual and mental processes as well as personal stories of people whose lives have been affected by using the drug.