Definition: A type of clinical trial in which both the researchers and the study participants know which drugs are being taken (and at what dose). These types of studies can still be randomized.
Open-Label Trial
By Julie Stachowiak, Ph.D., About.com
Updated: February 20, 2008
About.com Health's Disease and Condition content is reviewed by the Medical Review Board
Explore Multiple Sclerosis
Must Reads
About.com Special Features
Learn how you can reduce your your numbers with these nutrition and exercise tips. More >
Keep yourself, and your family, happy and healthy this fall with these tips. More >
Also from About.com:
©2009 About.com, a part of The New York Times Company.
All rights reserved.