as in effectiveness
the power to produce a desired result
questioned the efficacy of the alarms in actually preventing auto theft
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Recent Examples of efficacy
To study the approach’s efficacy, a team of researchers in Australia divided chronic pain sufferers into two groups.
—
Paul Smaglik, Discover Magazine, 7 May 2025
Gurley said a clinical study is needed to further study the effects of cinnamaldehyde on patients' medication consumption and efficacy of those medications.
—Hollie Silverman, MSNBC Newsweek, 4 May 2025
To demand that every new formulation be tested against an inert placebo would mean turning back the clock to reproduce trials that may have taken place decades ago, but resulted in the licensing of the original vaccine after safety and efficacy were established.
—Michael Hiltzik, Los Angeles Times, 8 May 2025
Sometimes, the drugs fail to demonstrate safety or efficacy, while other times, clinical trials run out of funding or struggle to recruit enough patients.
—Alexis Kayser, MSNBC Newsweek, 7 May 2025
See All Example Sentences for efficacy
Paul Smaglik, Discover Magazine, 7 May 2025
Gurley said a clinical study is needed to further study the effects of cinnamaldehyde on patients' medication consumption and efficacy of those medications.
—Hollie Silverman, MSNBC Newsweek, 4 May 2025
To demand that every new formulation be tested against an inert placebo would mean turning back the clock to reproduce trials that may have taken place decades ago, but resulted in the licensing of the original vaccine after safety and efficacy were established.
—Michael Hiltzik, Los Angeles Times, 8 May 2025
Sometimes, the drugs fail to demonstrate safety or efficacy, while other times, clinical trials run out of funding or struggle to recruit enough patients.
—Alexis Kayser, MSNBC Newsweek, 7 May 2025
See All Example Sentences for efficacy
Recent Examples of Synonyms for efficacy
efficiency
Noun
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Modern practices can not only improve efficiency and compliance but also open doors to strategic opportunities that drive growth and resilience.—
Gary Galstyan,
Forbes.com,
21 May 2025
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From Weeks 1-13, the Lions ranked top-10 in scoring defense (2nd), yards per game allowed (10th), rushing yards per game allowed (fifth), goal-to-go efficiency (third), red-zone efficiency (second), third-down conversion rate (1st), defensive success rate (sixth) and defensive EPA/play (second).—
Colton Pouncy,
New York Times,
21 May 2025
Cite this Entry
“Efficacy.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/efficacy. Accessed 25 May. 2025.
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