Phase II Clinical Research Organizations (Phase II CRO)

Phase II of a clinical trial involves several hundred participants who are living with the condition that the new medication is meant to treat. They’re usually given the same dose that was found to be safe in the previous phase.

Investigators monitor participants for several months or years to see how effective the medication is and to gather more information about any side effects it might cause. While phase II involves more participants than earlier phases, it’s still not large enough to demonstrate the overall safety of a medication. However, the data collected during this phase helps investigators come up with methods for conducting phase III.