: a secondary and usually adverse effect (as of a drug)
toxic side effects
called alsoside reaction
Example Sentences
Nausea and diarrhea are the side effects of the drug. the harmful side effects of using chemicals to kill insects The merger created positive side effects for both companies.
Recent Examples on the WebAlthough acute liver failure is noted in the product labeling information, a Novartis spokesperson acknowledged these episodes marked the first fatal cases attributed to the side effect. Ed Silverman, STAT, 17 Aug. 2022 Complicating the decision to extend boosters to 16- and 17-year-olds is that the Pfizer shot — and a similar vaccine made by Moderna — have been linked to a rare side effect. Matthew Perrone, chicagotribune.com, 9 Dec. 2021 Complicating the decision to extend boosters to 16- and 17-year-olds is that the Pfizer shot -- and a similar vaccine made by Moderna -- have been linked to a rare side effect. Lauran Neergaard And Matthew Perrone, Anchorage Daily News, 9 Dec. 2021 In the affected patients, researchers have seen a rare clotting reaction similar to a rare side effect of the blood-thinning medication heparin. Leah Rosenbaum, Forbes, 16 Apr. 2021 The agency could also tighten restrictions on pollutants such as mercury and nitrogen oxides, which would have the side effect of reducing carbon dioxide. Sammy Rothstaff Writer, Los Angeles Times, 7 July 2022 Preventing Ukraine from selling its wheat is not a side effect of the war. Stuart Anderson, Forbes, 21 June 2022 Each individual has to weigh the pros and cons from the very, very small risk of having a side effect of the vaccine.BostonGlobe.com, 10 Oct. 2021 But online, some people claim there is another side effect of the drug that people should be concerned about: male infertility. Mckenzie Sadeghi, USA TODAY, 15 Sep. 2021 See More
Word History
First Known Use
1814, in the meaning defined above
Medical Definition
side effect
noun
: a secondary and usually adverse effect (as of a drug)
toxic side effects
a side effect of drowsiness caused by antihistamines