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.

He experienced side effects, including loss of libido, hot flushes, mood swings and fatigue.

From BBC • Jun. 9, 2026

Zealand Pharma shares fell sharply after partner Boehringer Ingelheim said nearly one-fifth of patients in a late-stage study for an experimental obesity shot pulled out due to gastrointestinal side effects.

From The Wall Street Journal • Jun. 8, 2026

Pfizer is hopeful that the experimental drug can lessen the side effects like nausea and diarrhea that occur with GLP-1s.

From MarketWatch • Jun. 6, 2026

Chemotherapy attempts to control the disease through widespread cell destruction, causing significant collateral damage to healthy tissues that lead to side effects.

From Science Daily • Jun. 4, 2026

The unintentional side effects of wind or wave or current.

From "Internment" by Samira Ahmed