Ensysce Biosciences Strengthens Regulatory Team Ahead of Critical Phase 3 Trials and NDA Submission
• Ensysce Biosciences has appointed Tracy Hysong, CCRA, as Senior Director of Regulatory Affairs to support multiple clinical trials and upcoming regulatory submissions for its novel pain medications.
• The company is preparing for a pivotal Phase 3 study of PF614, with plans to submit a New Drug Application in 2026, while simultaneously advancing clinical studies for its overdose-protected pain medicine PF614-MPAR.
• Ensysce is also developing PF9001, a novel treatment for opioid use disorder featuring both abuse deterrence and overdose protection mechanisms, with IND-enabling studies planned for the coming year.
Ensysce Biosciences, Inc. (NASDAQ:ENSC), a clinical-stage pharmaceutical company focused on developing innovative pain management solutions with reduced abuse and overdose potential, has appointed Tracy Hysong, CCRA, as Senior Director of Regulatory Affairs to strengthen its management team ahead of multiple regulatory milestones.
Hysong brings significant regulatory expertise from her work at the University of California Davis (UC Davis), where she helped establish the UC Davis Clinical Trials Office as part of the Clinical and Translational Science Center. Her appointment comes at a critical time as Ensysce prepares to launch several important clinical and regulatory initiatives.
"The ability to bring Tracy on board at this time is crucial for the Company as it handles three current INDs, prepares to submit a fourth IND for PF9001 for OUD, and plans the regulatory submission of an NDA for PF614," said Dr. Lynn Kirkpatrick, CEO of Ensysce. "Tracy's experience with clinical trial support and regulatory affairs is perfectly timed to meet the Company's needs going forward."
Ensysce is positioning itself for significant advancement of its pipeline over the next 12-18 months. The company plans to initiate a Phase 3 pivotal study to evaluate the efficacy of PF614, its lead candidate for severe pain management, with a New Drug Application (NDA) submission targeted for 2026.
Concurrent with these efforts, Ensysce continues to conduct clinical studies for PF614-MPAR, described as a "groundbreaking overdose-protected pain medicine." The MPAR (Multi-Pill Abuse Resistance) technology represents a novel approach to preventing overdose deaths by limiting drug release even when multiple pills are ingested.
In addition to its pain management portfolio, Ensysce is preparing an Investigational New Drug (IND) Application for PF9001, a treatment for opioid use disorder (OUD). This candidate incorporates both abuse deterrence and overdose protection mechanisms, addressing two critical aspects of the ongoing opioid crisis.
The company's approach leverages its proprietary Trypsin-Activated Abuse Protection (TAAP™) platform, which creates prodrug formulations that require enzymatic activation in the digestive tract. This technology makes the drugs resistant to common methods of tampering used to accelerate drug release for abuse.
Ensysce's development pipeline directly addresses the ongoing opioid epidemic, which continues to claim thousands of lives annually in the United States. By developing medications that maintain effective pain relief while incorporating abuse-deterrent and overdose-protection features, the company aims to provide safer alternatives for patients with severe pain.
The company's dual-platform approach—combining TAAP™ and MPAR® technologies—represents a novel strategy in pain management. While several abuse-deterrent formulations exist on the market, few incorporate specific overdose protection mechanisms, potentially setting Ensysce's candidates apart in the analgesic landscape.
The market for abuse-deterrent opioid formulations has faced challenges in recent years, with payer resistance and generic competition affecting adoption. However, medications that can demonstrate meaningful reductions in overdose risk may find a more receptive audience among clinicians, payers, and regulatory authorities.
With its expanded regulatory team now in place, Ensysce appears positioned to navigate the complex regulatory landscape for controlled substances while advancing multiple candidates through late-stage development. The company's focus on both pain management and opioid use disorder treatment aligns with current public health priorities and unmet medical needs.
As Ensysce moves toward its Phase 3 trial for PF614 and continues development of its other candidates, the addition of experienced regulatory personnel like Hysong may prove critical to successfully translating its scientific innovations into approved therapies.

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