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.

On top of that, one of the biggest complaints about GLP-1s, when taken according to the standard doses approved by the FDA — is that they cause side effects such as nausea, diarrhea and fatigue.

From Los Angeles Times • Jun. 23, 2026

As a result, higher doses are often needed, increasing the risk of side effects, including acute muscle degeneration.

From Science Daily • Jun. 19, 2026

Like any medication, pain relief tablets can cause side effects.

From BBC • Jun. 14, 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

The entomologist, whose specialty is insects, is not so qualified by training, and is not psychologically disposed to look for undesirable side effects of his control program.

From "Silent Spring" by Rachel Carson