What it means
Any effect of a medicine that is not its main purpose. Many are mild and expected, such as sleepiness with an antihistamine or a dry mouth; some are even used on purpose. Side effects are usually listed as common and are often managed rather than stopping the drug. A harmful, unwanted effect is called an adverse effectad-VERS ih-FEKTAn unwanted and harmful effect of a drug or treatment given at a normal dose.advers/o against, turned againstFull entry .
For the nurse
Teach clients which side effects to expect and how to manage them, and which effects they must report. On the exam, separate an expected side effect (teach and support) from an adverse effect that needs the drug held and the provider told.
In a chart
"Client reports dry mouth, a known side effect; sugar-free lozenges suggested."
At a glance
| Spanish | efecto secundario |
|---|---|
| Also written | side effects, side-effects |
Related terms
adverse effect
An unwanted and harmful effect of a drug or treatment given at a normal dose.
contraindication
A reason not to give a drug or do a treatment, because in that person it could cause harm.