The Prescription Drug User Fee Act (PDUFA) authorizes the Food and Drug Administration (FDA) to collect user fees for reviewing and processing applications for the approval of certain human drug and biological products. There are generally four types of applications reviewed: New Drug Applications/Biologics License Applications (NDAs/BLAs); Investigational New Drug Applications (INDs); Efficacy Supplements; and Manufacturing Supplements.1 More information on the Prescription Drug User Fee Act can be found at the following website: http: //www.fda.gov/ForIndustry/UserFees/PrescriptionDrugUserFee/default.htm