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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.

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

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

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

In Phase 2 trials reported last year, amyloid quickly fell to low levels, while swelling and bleeding side effects were rare.

From Barron's • Jun. 3, 2026

I found out later that he had begun chemotherapy for his disease, and that one of the many side effects was nausea.

From "Drums, Girls, and Dangerous Pie" by Jordan Sonnenblick