GNT Pharma Receives South Korea’s Green Light to Launch Global Phase 3 Trials for Breakthrough Stroke Drug Nelonemdaz

25 July 2025 | Friday | News


Marking a paradigm shift in stroke therapy, Nelonemdaz becomes the world’s first dual-action neuroprotectant to enter global Phase 3 trials, combining NMDA receptor inhibition and free radical scavenging to significantly reduce stroke-related disability.

GNT Pharma, a late-stage biopharmaceutical company with operations in Seoul and New York, announced its IND Application to commence Global Phase 3 Clinical Trials of its lead drug Nelonemdaz, has been approved by MFDS - South Korea's regulatory body. Nelonemdaz is a first-in-class dual-action neuroprotectant aimed at reducing death and long-term disability following ischemic stroke. This approval is a significant step in accelerating the drug's trajectory towards global regulatory approvals and commercialization.

** World's First Dual-Action Stroke Therapy **
Nelonemdaz is the world's first stroke therapy to simultaneously inhibit NR2B-selective NMDA receptors and scavenge free radicals—two critical drivers of brain cell death following ischemic stroke. The drug is designed to complement existing revascularization therapies and overcome their clinical limitations.

** Global Clinical Collaboration **
The Phase 3 trial will enroll 378 patients with severe ischemic stroke eligible for thrombectomy within 12 hours of symptom onset. The protocol calls for intravenous administration of Nelonemdaz within 60 minutes of ER arrival, repeated 10 times over a 5-day period. Thrombectomy will be performed within 90 minutes of admission. The primary efficacy endpoint is functional independence in daily living at 12 weeks post-treatment.

The trial will be conducted across more than 20 world-leading stroke centers in Korea, USA, and Australia. Dr. BJ Gwag, CEO of GNT Pharma, stated, "Nelonemdaz offers a transformative approach to stroke treatment by combining neuroprotection with revascularization. We are excited to partner with world-renowned stroke experts to expand its global reach."

** Proven Safety & Efficacy **
Nelonemdaz demonstrated strong clinical promise in previous Phase 2 and 3 trials involving 704 stroke patients in Korea. When administered within 60 minutes of emergency room arrival, the drug improved disability outcomes by a factor of 4.3 compared to placebo, and by 2.22 times when administered within 70 minutes. These results were published in the Journal of Stroke (May 2025, Vol. 27(2)).

** A Paradigm Shift in Stroke Therapy **
Developed with support from the Korean Ministry of Science, ICT and other government agencies, Nelonemdaz represents a novel dual-action neuroprotective agent targeting both acute and diffuse neuronal damage.

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