They precede a drug’s FDA approval and release on the market. A clinical trial offers patients access to new drugs and the opportunity to contribute to scientific knowledge that benefits others.
There are three phases to clinical trials:
- Phase I, which determines whether people can safely take the drug
- Phase II, which determines whether the drug works to effectively treat disease
- Phase III, when a drug that has worked well in a small group of people is widely tested and its results are compared to the current standard of care