side effects vs side-effects

Both 'side effects' and 'side-effects' are correct, but 'side effects' is more commonly used in English. The hyphenated form 'side-effects' is also acceptable, especially in technical or formal writing.

Last updated: March 31, 2024 • 822 views

This is a commonly used and correct phrase in English.

"side effects"

This phrase is used to refer to the unintended or secondary effects of a drug, treatment, or action.

Examples:

The medication may have some side effects, such as drowsiness or nausea.
It's important to be aware of the potential side effects of the treatment.

Show examples from the web [+]

Tell your doctor about side effects you are experiencing, so you get the care and treatment you need to manage these problems. Credit: iStock. Cancer treatments ...
May 1, 2020 ... Why does chemo cause side effects? Cancer cells tend to grow fast, and chemo drugs kill fast-growing cells. But because these drugs travel ...
Statin side effects: Weigh the benefits and risks. Statins are effective at lowering cholesterol and protecting against a heart attack and stroke, although they ...
Jun 1, 2017 ... The majority of studies were performed for treatment of epilepsy and psychotic disorders. Here, the most commonly reported side effects were ...
Though it's often well-tolerated, CBD can cause side effects, such as dry mouth, diarrhea, reduced appetite, drowsiness and fatigue. CBD can also interact ...

Alternatives:

adverse effects
unintended consequences
secondary effects
undesired effects
aftereffects

This is also a correct phrase, especially in technical or formal writing.

"side-effects"

The hyphenated form 'side-effects' can be used interchangeably with 'side effects' to refer to the unintended or secondary effects of a drug, treatment, or action.

Examples:

The drug may cause some side-effects, such as dizziness or dry mouth.
The side-effects of the treatment should be carefully monitored.

Show examples from the web [+]

the side-effects of their use in excessive quantities.
Opiates seem to have funny side-effects.
Like all medicines, Abraxane can cause side-effects, although not everyone gets them.
The side-effects are generally similar to those related to the influenza vaccine.
Subject: Harmful side-effects of diabetes tablets
Until now, neither the Commission nor the Council have adequately explained the necessity, functionality, efficiency and probable side-effects of including biometric identifiers in identity documents.
But this particular neural implant has some side-effects.
I had no idea there would be these crazy side-effects.
Your side-effects have eaten half the passengers.
Patients must be given full and comprehensible information, especially concerning the side-effects of medicines and patient lifestyle factors.
It's one of the side-effects of roofies, is memory loss.
There are no side-effects caused by stopping treatment with Xeloda.
Other side-effects can occur when DEXDOMITOR is used with other medicines.
No side-effects have been reported with Convenia to date.
You could be more sensitive to the side-effects of antidepressants.
Like all medicines, Rapinyl can cause side-effects, although not everybody gets them.
The combination should be avoided unless the benefit outweighs the increased risk of systemic glucocorticoid side-effects.
It is also conspicuous as a range of side-effects.
The Commission is required to combat such side-effects.
The present recession proves that disturbances in the financial market have noticeable negative side-effects on the real economy.

Alternatives:

adverse effects
unintended consequences
secondary effects
undesired effects
aftereffects

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side effects vs side-effects

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