Drugs / Zelquistinel
last change Jul 2026 re-read 3 minutes ago

Zelquistinel

also known as AGN-241751 · GATE251

Small molecule

Developed for
major depressive disorder
Investigated by
Syndeio Biosciences, Inc · Worldwide Clinical Trials

Trials 5

PhaseRegistry idDatesIndicationSponsorStatusOutcome
Phase 11 trial
Phase 1 NCT04981561 Dec 2016 → Dec 2017 major depressive disorder Syndeio Biosciences, Inc Completed No outcome recorded
Phase 1/21 trial · 1 missed
Phase 1/2 NCT03726658 Nov 2018 → Oct 2019 major depressive disorder Syndeio Biosciences, Inc Completed Missed primary
Phase 23 trials · 1 missed
Phase 2 NCT07115329 Jan 2026 → Mar 2028 expected major depressive disorder Syndeio Biosciences, Inc Recruiting No outcome recorded
Phase 2 NCT06547489 Feb 2025 → Sep 2027 expected major depressive disorder Syndeio Biosciences, Inc Recruiting No outcome recorded
Phase 2 NCT03586427 Jun 2018 → Jul 2019 major depressive disorder Syndeio Biosciences, Inc Completed Missed primary
Comparator or background therapy1 trial
Phase 1 NCT07099989 Comparator Jul 2025 → Feb 2026 overdue — Syndeio Biosciences, Inc Active not recruiting No outcome recorded

News releases announcing trial results or a regulatory action · 2

DateIssuerRelease
2024-12-12 Syndeio Biosciences, Inc Results Gate Neurosciences Presents New Data and Insights Highlighting Unique Pharmacology of Synaptic Function Modulators at the 2024 ACNP Annual Meeting syndeio.bio ↗
The two ACNP presentations detailed new insights on the pharmacology of molecules that enhance synaptic function and neuroplasticity, including both ketamine and Gate’s lead program, zelquistinel (
2018-07-23 AbbVie Regulatory Allergan Receives FDA Fast Track Designation for AGN-241751 for the Treatment of Major Depressive Disorder (MDD) abbvie.com ↗
Allergan plc (NYSE: AGN), a leading global pharmaceutical company, today announced the U.S. Food and Drug Administration has granted Fast Track designation for AGN-241751, an investigational new treatment for Major Depressive Disorder (MDD).

Evidence & citations 6 cited values

Every value below carries the sentence it was read from. 7 sources stand behind the page.

FieldValueCited text
Known as zelquistinel “The purpose of this study is to evaluate the efficacy at 1 day post initial oral dose of zelquistinel (AGN-241751) compared with placebo in participants with Major Depressive...” NCT03586427 ↗
4

NCT04981561 ↗

NCT06547489 ↗

NCT07115329 ↗

NCT07099989 ↗

Known as AGN-241751 “The purpose of this study is to evaluate the efficacy at 1 day post initial oral dose of zelquistinel (AGN-241751) compared with placebo in participants with Major Depressive...” NCT03586427 ↗
1

NCT03726658 ↗

Known as GATE251 ChEMBL registry synonym — accepted as the source's own label CHEMBL5314944 ↗
Action Activate “positive allosteric modulator of the N-Methyl-D-Aspartate (NMDA) receptor” NCT07115329 ↗
Modality Small molecule — CHEMBL5314944 ↗
Route Oral “AGN-241751, oral administration, once per day in Part A. Twice per day (BID) in Part B” NCT03726658 ↗