side effects

NOUN

adverse or unwanted secondary effect

Synonyms

STRONGEST

aftereffect reaction

WEAK

aftermath aftertaste byproduct carryover concomitant corollary leftover offshoot secondary response side issue sidebar spinoff

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

side effects

Conventional IL-2 treatment, however, can produce serious side effects and can also stimulate immune cells that actually weaken the antitumor response.

From Science Daily ● Aug. 19, 2026

For Evans, as a doctor, the key is not keeping secrets, especially when it comes to side effects "because they can be serious".

From BBC ● Aug. 17, 2026

That said, they're not cheap, they can have side effects - some serious - and they may not mix well with some medications.

From BBC ● Aug. 17, 2026

It also showed exercise has a similar impact as anti-inflammatory drugs, but without the same side effects.

From Science Daily ● Aug. 16, 2026

Best of all, it had no major side effects.

From "The Name of the Wind" by Patrick Rothfuss