Drug development process is a very complex, time consuming and an expensive activity, which requires a broad array of expertise. The medical expertise plays a major role in evaluating the safety and efficacy of the drugs during pre-clinical and clinical phases. The present drug development process has evolved over the decades of efforts from the experts. To improve the quality of life by innovating new drugs, the experts are working hard  approximately for 8 to 12 years with an approximate expenditure of U.S. $600 million to U.S. $900 million.