Are the most commonly used drugs of the barbiturate family, and they depress the central nervous system into a sleeplike condition.

Sedatives

Explanation: Sedatives are substances / drugs typically used to make a person feel relaxed. Sedatives work by depressing the central nervous system thereby slowing down the activities of the brain. They are controlled substances due to there highly addictive nature and are usually prescribed to person's with sleep disorder, emotional distress, anxiety or general anesthetic.

Types of Sedatives include benzodiazepines and barbiturates.

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