This guidance is intended to help applicants develop draft labeling for proposed biosimilar products for submission in an application under section 351(k) of the Public Health Service Act (PHS Act) (42 U.S.C. 262(k)). The recommendations for prescription drug labeling in this guidance pertain only to the prescribing information (commonly referred to as the package insert), except for certain recommendations in section V pertaining to FDA-approved patient labeling (e.g., Patient Information, Medication Guide, and Instructions for Use). This guidance does not provide specific labeling recommendations for interchangeable products.