Drug research is the process of discovering and bringing a new drug into the market. The process of drug development is not a fast track process that can be completed within a small duration of time; eventually it takes a longer period of time and intense research behind it. During the process of drug development it includes the identification of lead compound through pre-clinical research on microorganisms and or animals followed by clinical trials on humans. The ultimate step of drug development may also include obtaining the regulatory approval to introduce it into the market from the holding drug administration authority. Broadly the process of drug development is clearly divided into pre-clinical and clinical work. During the process of pre-clinical work new chemical entities are developed and or discovered which are further modified in order to execute the final step of process i.e., human clinical trials. Before executing the clinical trials the new chemical entities are tested for safety, toxicity, pharmacokinetics, etc.
Review articles are the summary of current state of understanding on a particular research topic. They analyze or discuss research previously published by scientist and academicians rather than reporting novel research results.
Review article comes in the form of systematic reviews and literature reviews and are a form of secondary literature. Systematic reviews determine an objective list of criteria, and find all previously published original research papers that meet the criteria. They then compare the results presented in these papers. Literature reviews, by contrast, provide a summary of what the authors believe are the best and most relevant prior publications.
The concept of "review article" is separate from the concept of peer-reviewed literature. It is possible for a review to be peer-reviewed, and it is possible for a review to be non-peer-reviewed.
Last date updated on June, 2014