Is it ethical to use placebo in clinical trial?

Related questions

1. Can placebo cure cancer?
2. Why should placebos be used?
3. Do placebos work if you know?
4. Is Ibuprofen a placebo?
5. Can a placebo work if you know?
6. Why do doctors use placebos?
7. Are placebos ethical?
8. Are placebos effective?
9. Can you get pregnant on placebo pills?
10. Why do placebos work?

Tags

1. #research
2. #people
3. #rigorous
4. #placebo
5. #remains
6. #trials
7. #effective
8. #treatment
9. #conditions
10. #controls
11. #clinical
12. #accept
13. #requires
14. #subjects
15. #balancing
16. #controversial
17. #protection
18. #human
19. #abstract
20. #science
21. #ethical