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Definition

A major class of drugs that depress the central nervous system and are used principally to relieve pain. Examples include morphine, heroin, and codeine.

Keywords

Public Health Nervous System Central Nervous System Social Policy Major Class 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Copyright information

© Springer Science+Business Media LLC 2010

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