However, very few studies have been done in this nation to systematically study the efficacy and safety of this drug. The UA is a site for one of the first FDA-approved structured clinical trials of St. John's wort to study the efficacy of this herb compared to placebo in treating depression. Further research needs to be done in this area as well. All studies offer a free diagnosis or a confirmation of existing diagnosis, a free physical exam, laboratory tests and EKG, as well as regular visits with an experienced clinician. Participation is voluntary and all patients are well informed of study procedures before enrollment.
Participants receive a preliminary phone screen to determine initial eligibility for a study.