This guidance explains how FDA will issue and use an information request (IR) and/or a discipline review letter (DRL) during the assessment of an original abbreviated new drug application (ANDA) under section 505(j) of the Federal Food, Drug, and Cosmetic Act (FD&C Act) (21 U.S.C. 355(j)), as contemplated in the Generic Drug User Fee Amendments of 2017 (GDUFA II). This guidance does not apply to an amendment made in response to a complete response letter (CRL), a supplement, or an amendment to a supplement.