Author(s): Ankur Rohilla*, Ravi Kumar Singh, Deepti Sharma,Rahul Keshari and Ashok Kushnoor
According to WHO, the clinical trial is any research study that prospectively assigns human to one or more health-related interventions to evaluate the effects on health outcomes. The reliance on clinical trial methodology in order to generate scientificdata on the value of therapies working with all chronic diseases has been adopted worldwide. The clinical trials can be divided in various phases which five phases, i.e. 0, I, II, III and IV trials. The present review aims to discuss aboutthe various phases of clinical trials, the characterization of which has arisen from drug trials.