> ## Content Index
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# ‘Plausibility Mechanism’ Guidance Needs Clarifications: Article
- URL: https://www.fdaweb.com/plausibility-mechanism-guidance-needs-clarifications-article/
- Published: 2026-06-10T12:00:00.000Z
- Updated: 2026-09-14T13:40:55.000Z
- Author: David McFarland
- Tags: Drugs, #legacy-id-D5161288

A *Health Affairs* article says an FDA draft guidance on a “plausible mechanism” framework for approving treatments for patients with individualized genetic disorders needs further clarification. The [article](https://www.healthaffairs.org/content/forefront/refining-fda-s-plausible-mechanism-framework-part-2-manufacturing-challenges-product?ref=fdaweb.com) notes that an earlier piece praised the draft and proposed ways it could be improved when finalized.

It says additional issues to clarify in the final guidance are:

- manufacturing challenges;
- approval reach;
- post-approval considerations, and
- further considerations.

The article includes a chart with the authors’ recommended revisions for the final guidance.