The document outlines the generic drug approval process by the FDA. It describes that an applicant submits an abbreviated new drug application to obtain approval to market a generic drug. The FDA then performs an assessment of the application's completeness and may issue a "Refuse to File" letter if essential components are missing. The application then undergoes reviews of bioequivalence, chemistry, microbiology, and labeling. Deficiency letters are issued if any reviews are not acceptable. If inspections and all reviews are acceptable, and any patents have expired, the FDA will approve the abbreviated new drug application.