Efficacy is the ability of a medication or treatment to produce the desired results.
We sometimes discuss efficacy when discussing Migraine treatments and clinical trials. One of the goals of many clinical trials is to test the efficacy of new medications and other treatments..
You can read more about the efficacy of Migraine treatments and find listings of clinical trials in:
For more terms, see our Migraine and Headache Glossary.
Medical review by John Claude Krusz, PhD, MD.