A great Introduction to Clinical Trials from the National Cancer Institute
Understanding Clinical Trials from ClinicalTrials.gov
Here is a good Participant's Guide to Mental Health Clinical Research.
CenterWatch: Clinical Trial Listing Service Offers clinical trial information for professionals and patients. Search by medical condition or by therapeutic area.
Clinical Research: Provided by Quintiles. Search clinical studies in your area. The site provides study information, contact details, and a map to the study site.
ClinicalTrials.gov: A service of the U.S. National Institutes of Health.
From the website: "ClinicalTrials.gov is a registry of federally and privately supported clinical trials conducted in the United States and around the world. ClinicalTrials.gov gives you information about a trial's purpose, who may participate, locations, and phone numbers for more details."
NCI Clinical Trials: National Cancer Institite Clinical Trials homepage. Offers resources to help you find a clinical trial, clinical trial results, noteworthy clinical trials, and more.
NIMH Clinical Trials: Clinical trials from the National Institute of Mental Health. The site also offers links to general information on clinical trials as well as a Participant's Guide to Mental Health Clinical Research.
Running Clinical Trials: FDA website with a wealth of resources on running clinical trials including links to other resources.
Search for Clinical Trials using PubMed Clinical Queries.