The phrase "asked about the efficacy" is correct and usable in written English.
You can use it when inquiring about the effectiveness or performance of something, such as a treatment, method, or product.
Example: "During the meeting, she asked about the efficacy of the new marketing strategy we implemented last quarter."
Alternatives: "inquired about the effectiveness" or "questioned the performance".
Asked about the efficacy of Mr. Reich's approach, Mr. Fried said, "I wish him luck".
Last week Goldman Sachs, red in tooth and claw exponents of the system, put out a paper questioning present profit levels, observing: "There are broader questions to be asked about the efficacy of capitalism".
Add to that fears that some popular destinations are becoming saturated with low-spending tourists whose numbers and behaviour are raising local hackles, and questions are once again being asked about the efficacy of Spain's decades-old sol y playa (sun and beach) tourism model.
When asked about the efficacy of the protests, she added: "Nothing has been as big as this.
But the questions that Kaba and other activists are asking about the efficacy of relying on the state rather than the community are becoming more and more relevant, because we need to do more than just run domestic violence through the criminal justice system after they've been abused.
When asked about the potential efficacy of first-response ambulance systems, many participants were sceptical.
When asked about the perceived efficacy of the two treatments participants were significantly more likely to report that TEAM had helped them manage their health concern.
When asked about the anticipated efficacy of oral therapy, some patients, particularly those who were not willing to switch, were sceptical: "Well, I don't think it will work.
Strategic questions were defined as questions in which general feedback was asked about, e.g., the overall quality program or the clinical efficacy program.
Over a quarter of all respondents (27%) and over a third (37%) of respondents to the patient survey asked about the safety and/or efficacy of physical therapies.
When asked about the most important features of an optimal replacement medication, the patients ranked efficacy over 24 hours first and few side effects second.
