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# Drug Effectiveness Guide Comment Period Extended
- URL: https://www.fdaweb.com/drug-effectiveness-guide-comment-period-extended/
- Published: 2020-01-27T12:00:00.000Z
- Updated: 2026-09-14T16:00:08.000Z
- Author: David McFarland
- Tags: FDA Policy/General, #legacy-id-D5145930

*Federal Register* notice: FDA has extended until 3/19 the comment period for its draft guidance on “Demonstrating Substantial Evidence of Effectiveness for Human Drug and Biological Products; Draft Guidance for Industry; Availability.” To view the notice, click [here](https://www.govinfo.gov/content/pkg/FR-2020-01-27/pdf/2020-01322.pdf?ref=fdaweb.com).