Adverse effect
Adverse effect
Adverse effect (pronunciation: /ˈædvɜːrs ɪˈfɛkt/) is a term used in medicine to describe an undesired harmful effect resulting from a medication or other intervention such as surgery.
Etymology
The term "adverse effect" is derived from the Latin words "adversus" meaning "opposite" and "effectus" meaning "result". It is used to describe a negative outcome that is contrary to the desired or expected result.
Definition
An adverse effect may be termed a "side effect", when judged to be secondary to a main or therapeutic effect. If it results in an unexpected disease or symptom, it may be called an "adverse event". When a sequence of adverse effects is produced by a series of actions or events, it is known as a "cascade effect".
Related Terms
- Side effect: An effect, whether therapeutic or adverse, that is secondary to the one intended.
- Adverse event: Any untoward medical occurrence in a patient or clinical investigation subject administered a pharmaceutical product and which does not necessarily have a causal relationship with this treatment.
- Cascade effect: The domino effect that a single change in a system can have by causing similar changes in dependent systems.
See Also
References
External links
- Medical encyclopedia article on Adverse effect
- Wikipedia's article - Adverse effect
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