The drug which is not branded but it was somewhat work like branded or reference listed drug is called as generic drug. The drug is similar in relation to dose, administration and efficiency. The components are same in the generic drug as it was in the branded drugs and this was according to the guidelines of the FDA. Generic Drug high impact factor journals are those considered to be highly influential in their respective fields. The impact factor of journal provides quantitative assessment tool for grading, evaluating, sorting and comparing journals of similar kind. It reflects the average number of citations to recent articles published in science and social science journals in a particular year or period, and is frequently used as a proxy for the relative importance of a journal within its field. It is first devised by Eugene Garfield, the founder of the Institute for Scientific Information. The impact factor of a journal is evaluated by dividing the number of current year citations to the source items published in that journal during the previous two years.