Clinical research is branch dealing with the clinical aspects of the medicine. This research of is used for the determination of medications including drugs, antibiotics, immunotherapies, chemotherapeutic drugs, plant derived drugs, devices, diagnostic products, treatment regimes, for their efficacy, mechanisms, way of action, toxicity, concurrent infections including others. This kind of research is based on patients, or other animal models for finding out the efficacy of the medications, development of diseases and to formulate methods for treating. It is different from clinical practice, thus, collecting evidence based on the treatment for the mode of Acton of treatment. These are usually conducted n hospitals, academic institutions and medical practicing places.