Final answer:
Narcotics, such as morphine, are potent pain-relieving substances derived from opium and can be highly addictive.
Explanation:
An example of a narcotic is morphine. Narcotics, derived from opium, are highly effective in relieving pain and include substances like codeine, heroin, and methadone. They can induce drowsiness, euphoria, and relaxation, and are physically addictive with potentially fatal consequences in high doses.
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