Might mean (unverified): Not producing the desired effect.
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We found one dictionary that defines the word nonefficacious:

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  1. nonefficacious: Wiktionary

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Definitions from Wiktionary (nonefficacious)

▸ adjective:  Not efficacious.

Similar:
unefficacious, inefficacious, noneffectual, noneffective, inefficient, ineffective, ineffectual, uneffectual, subefficacious, unefficient, more...

Opposite:
effective, efficacious, successful, productive, fruitful

▸ Words similar to nonefficacious

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Similar:
unefficacious, inefficacious, noneffectual, noneffective, inefficient, ineffective, ineffectual, uneffectual, subefficacious, unefficient, more...

Opposite:
effective, efficacious, successful, productive, fruitful



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