Clinical trials are experiments done in clinical research. Such prospective biomedical or behavioral research studies on<unk>  participants are designed to answer specific questions about biomedical or behavioral interventions, including new treatments (such as novel vaccines, drugs, dietary choices, dietary supplements, and medical devices) and known interventions that warrant further study and comparison. Clinical trials generate data on safety and efficacy. They are conducted only after they have received health authority/ethics committee approval in the country where approval of the therapy is sought. These authorities are responsible for vetting the risk/benefit ratio of the trial - their approval does not mean that the therapy is 'safe' or effective, only that the trial may be conducted. Depending on product type and development stage, investigators initially enroll volunteers and/or patients into small pilot studies, and subsequently conduct progressively larger scale comparative studies. Clinical trials can vary in size and cost, and they can involve a single research center or multiple centers, in one country or in multiple countries. Clinical study design aims to ensure the scientific validity and reproducibility of the results. Trials can be quite costly, depending on a number of factors. The sponsor may be a governmental organization or a pharmaceutical, biotechnology or medical device company. Certain functions necessary to the trial, such as monitoring and lab work, may be managed by an outsourced partner, such as a contract research organization or a central laboratory. For example, a clinical drug trial case at the University of Minnesota that was under investigation in 2015 for the Death of Dan Markingson was funded by AstraZeneca, a pharmaceutical company headquartered in the United Kingdom.
Human subject research
Clinical trials publication
Human experimentation in North Korea
Candidate of Medicine
Clinical trial naming conventions
Clinical research ethics
Clinical research associate
Phases of clinical research