Five Questions With Dr. James McDonald

Dr. James McDonald | Medical director, R.I. Department of Health 1. What is the science behind medical marijuana? Marijuana plants contain different chemicals that are collectively known as cannabinoids. Various cannabinoids have different effects on different parts of the body. Delta-9-tetrahydrocannabinol (THC) and cannabidiol (CBD) are some of the main chemicals in medical marijuana. Federal

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