Efficacy

In pharmacology, efficacy (E_max) is the maximum response achievable from an applied or dosed agent, for instance, a small molecule drug https://en.wikipedia.org/wiki/Efficacy

Efficacy is a drug's capacity to produce an effect (such as lowering blood pressure). For example, the diuretic furosemide eliminates much more salt and water through urine than does the diuretic hydrochlorothiazide. Thus, furosemide has greater efficacy than hydrochlorothiazide. https://www.merckmanuals.com/home/drugs/drug-dynamics/drug-action


Not very useful for clinical settings. but more for clinical trials.