efficacious

Definitions

Successful in producing a desired or intended result; effective.

Having the power to produce a specific effect.

Examples

The new medication proved to be highly efficacious in treating the patient's chronic condition.

The committee sought an efficacious strategy to reduce waste and improve overall productivity.

Synonyms

effective productive potent successful fruitful efficient capable

Antonyms

ineffective useless fruitless inefficient unproductive incompetent futile