Definitions for narcotics
U.S. National Library of Medicine
Agents that induce NARCOSIS. This term is considered outdated due to imprecision but continues to be widely used. Originally, agents that caused somnolence or induced sleep (STUPOR); now, any derivative, natural or synthetic, of OPIUM or MORPHINE or any substance that has their effects. Narcotics are potent inducers of ANALGESIA and OPIOID-RELATED DISORDERS.