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controlled substance

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noun
  1. any of a category of behavior-altering or addictive drugs, as heroin or cocaine, whose possession and use are restricted by law.
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Origin of controlled substance

First recorded in 1970–75
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

controlled substance in Medicine

controlled substance

n.
  1. A drug or chemical substance whose possession and use are regulated under the Controlled Substances Act.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.