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# Draft Guide on Microdose Radiopharmaceutical Diagnostic Drugs
- URL: https://www.fdaweb.com/draft-guide-on-microdose-radiopharmaceutical-diagnostic-drugs/
- Published: 2017-09-13T12:00:00.000Z
- Updated: 2026-09-14T22:49:54.000Z
- Author: David McFarland
- Tags: FDA Policy/General, #legacy-id-D5139616

*Federal Register* notice: FDA has made available a draft guidance entitled “Microdose Radiopharmaceutical Diagnostic Drugs: Nonclinical Study Recommendations.” The document is intended to assist developers with refining nonclinical study recommendations for this class of drug given its unique characteristics. It also provides recommendations for a pathway to full drug development the diagnostic drugs. To view the notice, click [here](https://www.gpo.gov/fdsys/pkg/FR-2017-09-13/pdf/2017-19435.pdf?ref=fdaweb.com).