This guidance is intended for applicants that are required to report annually on the status of postmarketing studies and clinical trials for human drug and biological products under section 506B of the Federal Food, Drug, and Cosmetic Act (FD&C Act) (21 U.S.C. 356b) and its implementing regulations at 21 CFR 314.81(b)(2)(vii) and 601.70. In other words, this guidance is intended for applicants that are required by statute or regulation, or that have agreed in writing, to conduct postmarketing studies or clinical trials concerning a product’s clinical safety, clinical efficacy, clinical pharmacology, and nonclinical toxicology as postmarketing requirements (PMRs) or postmarketing commitments (PMCs). This guidance describes the purpose and content of Form FDA 3988, Transmittal of PMR/PMC Submissions for Drugs and Biologics, and Form FDA 3989, PMR/PMC Annual Status Report for Drugs and Biologics; when to use these forms; and how to submit these forms. Submission of completed Form FDA 3989 will meet the reporting requirements for postmarketing studies or clinical trials described in section 506B of the FD&C Act and its implementing regulations.