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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.

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

Researchers say this approach improved blood sugar regulation and body composition in animal studies while avoiding several side effects often linked to GLP-1 therapies, including appetite suppression, muscle loss, and digestive issues.

From Science Daily • Jun. 3, 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

For her, like Dr. Gazzaley, the applications are potentially widespread—someday we may be able to treat attention deficit disorder, learning disabilities, and attention-related memory loss without drugs, which can have side effects.

From "A Deadly Wandering: A Mystery, a Landmark Investigation, and the Astonishing Science of Attention in the Digital Age" by Matt Richtel