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# 3 DESI Final Determinations Posted
- URL: https://www.fdaweb.com/3-desi-final-determinations-posted/
- Published: 2020-08-26T12:00:00.000Z
- Updated: 2026-09-14T16:26:40.000Z
- Author: David McFarland
- Tags: Drugs, #legacy-id-D5147514

FDA has posted final determinations reached in July for three of the nine open drug efficacy study implementation (DESI) proceedings that look at the effectiveness of drugs that had been approved only for safety between 1938 and 1962.

The [post](https://www.fda.gov/drugs/enforcement-activities-fda/drug-efficacy-study-implementation-desi?ref=fdaweb.com) shows final determinations for pentaerythritol tetranitrate; peripheral vasodilators, Vasodilan (isoxsuprine); and iodochlorhydroxyquin and hydrocortisone, Vioform HC.