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# Guide on Washout Period Eligibility Criteria
- URL: https://www.fdaweb.com/guide-on-washout-period-eligibility-criteria/
- Published: 2024-04-26T12:00:00.000Z
- Updated: 2026-09-14T14:29:18.000Z
- Author: David McFarland
- Tags: FDA Policy/General, #legacy-id-D5156862

*Federal Register* notice: FDA is making available a draft guidance entitled “Cancer Clinical Trial Eligibility Criteria: Washout Periods and Concomitant Medications.” The document provides recommendations regarding the appropriate use of washout periods and concomitant medication exclusions. To view the notice, click [here](https://www.govinfo.gov/content/pkg/FR-2024-04-26/pdf/2024-09038.pdf?ref=fdaweb.com).