Efficacy — synonyms, efficacy antonyms, definition

1. efficacy (Noun)

action adequacy capability effect effectiveness efficaciousness efficiency energy force influence intensity might operation potency potential power productiveness productivity proficiency strength • • • inefficacy

efficacy (Noun) — Capacity or power to produce a desired effect. ex. "concern about the safety and efficacy of the vaccine"

effectiveness effectivity effectuality effectualness efficacious inefficacious