Which of the following groups of drugs tends to increase central nervous system activation and behavioral activity?

Question

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Stimulants are a group of drugs that tend to increase central nervous system activation and behavioral activity. This includes drugs like caffeine, amphetamines, cocaine, and nicotine. Narcotics (such as heroin) and sedatives (such as benzodiazepines) have the opposite effect, causing a decrease in central nervous system activity and behavioral activity. Barbiturates can have sedative effects as well.

Which of the Following Groups of Drugs Tends to Increase