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View definitions for efficacious

efficacious

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Example Sentences

It’s a huge ask of a drug that it be so safe and so efficacious that you can give it to everybody.

By early 2020, we had a tremendous amount of data showing that in the mouse model that we had developed, these mRNA spike vaccines were really efficacious in protecting against lethal MERS-CoV infection.

In a release on May 25, Moderna says its vaccine is safe and efficacious among 12- to 18-year olds.

From Time

If the studies show the new vaccine could be stable and efficacious at refrigerated temperatures, that could increase the number of places that could vaccinate with Moderna’s shot.

From Time

Several days later, however, the company issued another press release including additional data that showed the vaccine is 76% efficacious in protecting people from disease.

From Time

But Michele Bachmann, who has been a wallflower of late, may point the way to a more efficacious line of attack: crony capitalism.

I asked him if he thought cattle cars would be an efficacious means of transporting the Palestinians to their new homes.

He inclines to the use of the tepid bath, as likely to be the most generally efficacious.

I know not how to offer advice, and I am incapable of giving any efficacious help.

I can say from experience, that it is a powerful sudorific, and very efficacious in a cold.

However much the theologian may believe in prayer, he cannot deny that it is less efficacious than action.

The commissioners regarded the land purchase act as embodying the most simple and efficacious remedy for existing evils.

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When To Use

What are other ways to say efficacious?

The adjective efficacious suggests the capability of achieving a certain end: an efficacious plan, medicine. Effectual is used especially of that which produces the effect desired or intended, or a decisive result: An effectual bombardment silenced the enemy. Effective is applied to a person or a thing that has the power to, or which actually does, produce an effect: an effective boss, remedy, speech. Efficient (applied also to persons) implies the skillful use of energy or industry to accomplish desired results with little waste of effort: efficient methods; an efficient manager. 

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On this page you'll find 60 synonyms, antonyms, and words related to efficacious, such as: effective, effectual, productive, active, adequate, and capable.

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.

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