The current version of the vocabulary builder covers over 2720 words & is useful for students preparing for academic English examinations such as SAT, GRE, GMAT, etc. Now you can also listen to the pronunciation of words. - Refer a Friend.|
efficacy (noun) the ability to produce the desired result, especially of a medicine and medical treatment.
The efficacy of a drug is its ability to bring about the desired cure. Effective medical treatment has efficacy if it cures the patient of their disease. A drug may not have the efficacy expected of it, if its ingredients are not in the proper proportions.
- The efficacy of most drugs is suspect because the materials that go into the making of it are substandard and so patients remain uncured.
- The drug obtained from a very common herb has been found to have the efficacy to control high blood pressure, and research is still going on to find out if it has the efficacy to cure other related ailments also.