- Originally, any drug derived from opium or opiumlike compounds with potent analgesic effects associated with both significant alteration of mood and behavior and with potential for dependence and tolerance.
- More recently, any drug, synthetic or naturally occurring, with effects similar to those of opium and opium derivatives, including meperidine, fentanyl, and their derivatives.
- Capable of inducing a state of stuporous analgesia.
[G. narkotikos, benumbing]
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Examples: glitazone, GI cocktail, etc.