abused stimulant

Any of a number of substances—such as amphetamines (e.g., methamphetamine or “ice”), cocaine (e.g., “crack” or “coke”), nicotine products (e.g., cigars, cigarettes, or chewing tobacco), and caffeine products (e.g., tea, soft drinks, and soda)—that are misused to increase the functioning of the central nervous system.