Clinical research could be a branch of tending science that determines the security and effectiveness (efficacy) of medicines, devices, diagnostic product and treatment regimens supposed for human use. These is also used for interference, treatment, identification or for relieving symptoms of a illness. Clinical research is completely different from clinical practice. In clinical practice established treatments are used, whereas in clinical research evidence is collected to determine a treatment. The term "clinical research" refers to the whole listing of a drug/device/biologic, really any check article from its beginning within the workplace to its introduction to the buyer market and on the far side. Once the promising candidate or the molecule is known within the workplace, it's subjected to pre-clinical studies or animal studies wherever completely different aspects of the check article (including its safety toxicity if applicable and effectiveness, if doable at this early stage) area unit studied.