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Although you can comment on any guidance at any time (see 21 CFR 10.115(g)(5)), to ensure that the FDA considers your comment on a draft guidance before it begins work on the final version of the guidance, submit either online or written comments on the draft guidance before the close date.
If unable to submit comments online, please mail written comments to:
Food and Drug Administration
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All written comments should be identified with this document's docket number: FDA-2020-D-1402
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Guidance Issuing OfficeCenter for Veterinary Medicine
This guidance describes principles for designing, conducting, and reporting the results for investigations or studies including biomarkers and/or surrogate endpoints to demonstrate substantial evidence of effectiveness or a reasonable expectation of effectiveness of drugs intended for use in animals and to support the approval of a new animal drug application (NADA) or an application for conditional approval of a new animal drug (CNADA). This guidance also provides information about obtaining feedback from CVM with respect to incorporating biomarkers and/or surrogate endpoints in investigations and study protocols for new animal drugs.