Arches. Photo by Daniel Chia
HOPES: Huntington's Outreach Project for Education, at Stanford
Feb
08
2011

phase III clinical trial

The third in a series of studies that test the safety and efficacy of a new drug or treatment in human participants and is only performed once the drug has successfully passed the phase II clinical trial. This study involves large numbers of participants and may compare the efficacy of the new treatment with a standard treatment. It also assesses the safety of long-term use.