A clinical trial known as a research study is the process of testing new medications, devices or treatment options.  During a trial, data is collected and analyzed for safety and efficacy purposes.  Individuals choose to volunteer and participate in these studies. Some drugs may already be approved in other countries, however the FDA requires further testing to be approved for use in the United States. A clinical trial may also take place if a product is being tested for a different purpose.  Participation in these trials is always voluntary and can be withdrawn at any time the patient wishes. In most clinical trials the treatment, office visits, and related tests are provided at no charge to the patient or their insurance company. Often times, there is financial compensation for participation to cover travel costs and time commitments.