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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can comment on any guidance at any time (see 21 CFR 10.115(g)(5)), to ensure that the FDA considers your comment on a draft guidance before it begins work on the final version of the guidance, submit either online or written comments on the draft guidance before the close date.

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All written comments should be identified with this document's docket number: FDA-2024-D-4540

Docket Number:
FDA-2024-D-4540
Issued by:

Guidance Issuing Office

Center for Drug Evaluation and Research

The Food and Drug Administration (FDA or Agency) is announcing the availability of a draft guidance for industry entitled “Recommended Followup Testing for an Ames-Positive Drug (Active Ingredient) or Metabolite To Support First-in-Human Clinical Trials With Healthy Subjects.” This draft guidance makes recommendations on followup testing for Ames-positive active ingredients in circumstances when a sponsor decides to continue development. The guidance recommends a consistent process of followup testing and evaluation that first should be conducted for an Ames-positive active ingredient before proceeding with first-in-human (FIH) trials in healthy human subjects. These recommendations are intended to potentially help address and lower safety concerns before proceeding with FIH trials in healthy human subjects.