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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.

Pairing it with immunotherapy in a single drug appears to somehow sharpen the benefit while reducing the side effects, Schoenfeld said.

From The Wall Street Journal • Jun. 6, 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

One of the hardest parts of cancer is how little control you have over any of it - the diagnosis, treatment, or the side effects.

From BBC • Jun. 3, 2026

The rather chimerical notion of a nuclear bomb without radioactive side effects had emerged in late 1954 and had been embraced by Livermore, where it fit nicely with the lab’s brief to explore new ideas.

From "Big Science" by Michael Hiltzik