adverse reaction

adverse reaction definition - medical

ad·verse reaction (ăd-vûrsˈ, ădˈvûrsˌ)

noun
A result of drug therapy that is neither intended nor expected in normal therapeutic use and that causes significant, sometimes life-threatening conditions.

The American Heritage® Medical Dictionary Copyright © 2009 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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