REL-1017 (Esmethadone) as Adjunctive Treatment in Patients With Major Depressive Disorder: A Phase 2a Randomized Double-Blind Trial

Fava Maurizio, Stephen Stahl, Luca Pani, Sara De Martin, Marco Pappagallo, Clotilde Guidetti, Andrea Alimonti, Ezio Bettini, Richard M. Mangano, Thomas Wessel, Marc Somer, Judy Caron, Ottavio V. Vitolo, Gina R. DiGuglielmo, Adam Gilbert, Hiren Mehta, Morgan Kearney, Andrea Mattarei, Marco Gentilucci, Franco FolliSergio Traversa, Charles E. Inturrisi, Paolo L. Manfredi

Research output: Contribution to journalArticlepeer-review

46 Scopus citations

Abstract

Objective: The purpose of this study was to examine the efficacy endpoint was the Montgomery-Åsberg Depreseffects of REL-1017 (esmethadone), a novel N-methyl-Dsion Scale (MADRS) score. All 62 randomly assigned aspartate receptor (NMDAR) channel blocker, in patients patients were included in the full analysis set population with major depressive disorder who failed to benefit from analysis. one to three standard antidepressant treatments in their Results: Patients experienced mild or moderate transient current major depressive episode. adverse events and no evidence of dissociative or psyMethods: A 7-day phase 2 multicenter randomized chotomimetic effects, opioid effects, or withdrawal signs double-blind placebo-controlled trial, comprising three and symptoms. The improvement in MADRS score shown arms, was conducted to assess the safety, tolerability, on day 4 in both of the REL-1017 dosage groups was suspharmacokinetics, and efficacy of two dosages of RELtained through day 7 (last dose) and day 14 (7 days after 1017 (25 mg or 50 mg orally once a day). Patients were the last dose), with effect sizes from 0.7 to 1.0. randomly assigned in a 1:1:1 ratio to placebo (N522), Conclusions: This trial showed favorable safety, tolerabilREL-1017 25 mg/day (N519), or REL-1017 50 mg/day ity, and pharmacokinetic profiles and suggests that REL(N521). Safety scales included the 4-item Positive Symp-1017 may have rapid and sustained antidepressant effects tom Rating Scale for psychotomimetic symptoms, the compared with placebo in patients with inadequate Clinician-Administered Dissociative States Scale for dis-responses to antidepressant treatments. These results will sociative symptoms, the Clinical Opiate Withdrawal Scale need confirmation in larger and longer trials. for withdrawal signs and symptoms, and the Columbia-Suicide Severity Rating Scale for suicidality. The primary Am J Psychiatry 2022; 179:122–131; doi: 10.1176/appi.ajp.2021.21020197

Original languageEnglish (US)
Pages (from-to)122-131
Number of pages10
JournalAmerican Journal of Psychiatry
Volume179
Issue number2
DOIs
StatePublished - Feb 2022

ASJC Scopus subject areas

  • Psychiatry and Mental health

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