The Food and Drug Administration and the Office of Special Health Issues provides general information about clinical trials.
ClinicalTrials.gov and CenterWatch.com offer information about specific clinical trials.
The National Cancer Institute supplies information about cancer research studies.
AIDSinfo furnishes research studies related to AIDS and HIV.
CISCRP (Center for Information on Study on Clinical Research Participation) provides potential research subjects with information to assist them in making an informed decision on whether or not to participate in a research study.
WebMD offers information such as commonly asked questions regarding clinical research, and also a listing of clinical trials.
PhRMA (Pharmaceutical Research and Manufacturers of America) provides a database for all medicines currently in clinical trials or at FDA review.