What does efficacy mean as it applies to research?

Related questions

1. Are efficacy and effectiveness the same?
2. What is the difference between efficacy and potency?
3. Do competitive antagonists have efficacy?
4. Can medication build up in your system?
5. What is the purpose of a phase 3 clinical trial?
6. What is toxic overload in the body?
7. What's the difference between effective and efficacious?
8. How do drugs exert their effects?
9. What does a higher ec50 mean?
10. How many hours apart should you take antibiotics 4 times a day?

Tags

1. #efficacy
2. #effectiveness
3. #defined
4. #ideal
5. #whereas
6. #under
7. #intervention
8. #studies
9. #placed
10. #controlled
11. #trials
12. #conditions
13. #circumstances
14. #continuum
15. #performance
16. #refers
17. #world
18. #progression