Medical Definition of Adverse reaction

Reviewed on 3/29/2021

Adverse reaction: In pharmacology, any unexpected or dangerous reaction to a drug. An unwanted effect caused by the administration of a drug. The onset of the adverse reaction may be sudden or develop over time.

Also called an adverse drug event (ADE), adverse drug reaction (ADR), adverse effect or adverse event.

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QUESTION

If menopause occurs in a woman younger than ___ years, it is considered to be premature. See Answer

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