Charlotte's Web Medical Access Act of 2017 This bill amends the Controlled Substances Act (CSA): to add definitions for the terms "cannabidiol" and "cannabidiol-rich plants," to exclude cannabidiol and cannabidiol-rich plants from the definition of marijuana, and to remove cannabidiol and cannabidiol-rich plants from coverage under the CSA. The bill also removes cannabidiol and cannabidiol-rich plants from coverage under the Federal Food, Drug, and Cosmetic Act. Finally, it specifies that no provision of this bill prohibits or restricts the use, production, or distribution of marijuana in a state in which such activities are legal under state law.