What is the purpose of a Phase 4 clinical trial?

Related questions

1. Is Clinical Trial money taxable?
2. How many drugs fail clinical trials?
3. Does insurance pay for immunotherapy?
4. Are cancer clinical trials free?
5. Does insurance pay for clinical trials?
6. How do patients pay for clinical trials?
7. Who can participate in clinical trials?
8. Are clinical trials profitable?
9. What is Phase 1 of a clinical trial?
10. What is the purpose of clinical trials?

Tags

1. #greater
2. #clinical
3. #patients
4. #evaluate
5. #trials
6. #period
7. #number
8. #approves
9. #place
10. #after
11. #marketing
12. #research
13. #drugs
14. #treatments
15. #effects
16. #phase
17. #identify
18. #lengthy
19. #conducted
20. #takes