narcotic

Pronunciation: (nar-KAH-tik)

A substance used to treat moderate to severe pain. Narcotics are like opiates such as morphine and codeine, but are not made from opium. They bind to opioid receptors in the central nervous system. Narcotics are now called opioids.

Source: NCI Dictionary of Cancer Terms

Date last modified: 2009-05-01