The phrase "different efficacy" is correct and commonly used in written English.
For example, a study on two types of cancer treatments concluded that one had a higher efficacy than the other, demonstrating the different efficacy of the two therapies.
Whether these differences in binding sites confer different efficacy or mode of action has not been established.
These differences are clearly due to a different efficacy of available treatment [ 13], even if changes in interpretations and classifications of death certificates over time may have influenced results [ 36].
Within these therapeutic classes, careful choice of antihypertensive treatment is essential as drugs have different efficacy and tolerability profiles due to differences in molecular structure, pharmacokinetics, and pharmacodynamics.
It has, therefore, been thought that the differences with respect to their pharmacokinetics can cause a different efficacy, frequency of recurrence, and consistency of response, and they can therefore allow choosing the most appropriate triptan for each patient [7].
This has been evidenced in literature that the compounds of same class behave differently with bacterial strains such as quinolone based antibiotics encounter bacteria action with different efficacy and also face different mode of resistance from bacterial strains as well.
Different triptan agents may have different efficacy.
The findings also contribute to better understanding of the roles of different efficacy beliefs in social mobilization.
As the pre-clinical investigations for the next generation AVDs are currently ongoing different efficacy scenarios have been simulated.
In these combinations, sequence of treatment, treatment duration and cytotoxicity are very dynamic and sensitive resulting in different efficacy rates.
The drugs available for long-term maintenance have different efficacy for preventing mania and depression, suggesting the need for complimentary agents (Smith et al. 2007).
On the other hand, no direct comparison has ever been made between the two drugs, allowing for a definite confirmation of any different efficacy and safety.
