How do they conduct a clinical trial?

Intake: You need to meet the criteria for the specific condition being studied by the clinical trial. For example, if the clinical trial was for depression, you would need to meet the criteria for depression. You would go to the clinic and be evaluated.

Clinical research: All clinical trials require extensive review for scientific rationale and safety before starting. Clinical trials are conducted by specialists who see, evaluate and treat patients that meet defined eligibility criteria. In general there are three phases of clinical trials with phase 1 studies showing safety, phase 2 preliminary evidence of effectiveness and phase3 leading to drug approval.