NeuroSense Receives FDA Clearance to Initiate Pivotal Phase 3 Trial for PrimeC in ALS
Rhea-AI Summary
NeuroSense (Nasdaq: NRSN) announced that the U.S. Food and Drug Administration completed review of its IND amendment and authorized initiation of the pivotal Phase 3 trial PARAGON evaluating PrimeC in amyotrophic lateral sclerosis (ALS) on Nov 24, 2025. PARAGON is planned as a global, double-blind, 12-month, placebo-controlled study with 300 participants randomized 2:1 (PrimeC:placebo), an open-label extension, an adaptive design with interim analyses, and is powered at >95% for its primary endpoint. NeuroSense aims to enroll the first patient in the coming months subject to securing strategic resources. Additional trial details and timelines will be presented at an investor webinar on Dec 8, 2025.
Positive
- FDA cleared IND amendment to start Phase 3
- PARAGON powered at >95% for primary endpoint
- Phase 2b showed promising clinical and biomarker outcomes with favorable safety
- 300-patient global randomized 2:1 design with 12-month placebo control
Negative
- First patient enrollment contingent on securing strategic resources, risking delays
- Adaptive design includes futility boundaries that could stop the trial early
News Market Reaction – NRSN
On the day this news was published, NRSN declined 3.64%, reflecting a moderate negative market reaction. Argus tracked a peak move of +4.1% during that session. Argus tracked a trough of -15.5% from its starting point during tracking. Our momentum scanner triggered 13 alerts that day, indicating notable trading interest and price volatility. This price movement removed approximately $1M from the company's valuation, bringing the market cap to $36M at that time. Trading volume was elevated at 3.0x the daily average, suggesting increased selling activity.
Data tracked by StockTitan Argus on the day of publication.
With the FDA's clearance, NeuroSense is preparing for trial initiation and aims to have its first patient enrolled in the coming months upon securing the strategic resources needed to launch the trial.
The global pivotal Phase 3 trial, PARAGON, is powered at over
"This FDA clearance marks a meaningful advancement for NeuroSense and for people living with ALS. We believe this progress lays a strong foundation for additional achievements across several fronts in the near future," stated Alon Ben-Noon, Chief Executive Officer of NeuroSense. "We recognize the significant unmet need of people living with ALS and remain committed to delivering a meaningful therapy through our efforts."
Based on prior successful discussions with the FDA and in line with its recent comments and recommendations, PARAGON is expected to be conducted in the
Additional details regarding the PARAGON trial design and timelines will be provided in NeuroSense's upcoming investor webinar on December 8th, 2025 and on NeuroSense's website. Registration to the webinar is available here.
About ALS
Amyotrophic lateral sclerosis ("ALS") is an incurable neurodegenerative disease that causes complete paralysis and death within 2-5 years from diagnosis. Every year, more than 5,000 people are diagnosed with ALS in the
About PrimeC
PrimeC, NeuroSense's lead drug candidate, is a novel extended-release oral formulation composed of a unique fixed-dose combination of two FDA-approved drugs: ciprofloxacin and celecoxib. PrimeC is designed to synergistically target several key mechanisms of ALS and Alzheimer's Disease (AD) that contribute to motor neuron degeneration, inflammation, iron accumulation and impaired ribonucleic acid ("RNA") regulation to potentially inhibit the progression of ALS and AD.
About NeuroSense
NeuroSense Therapeutics, Ltd. is a clinical-stage biotechnology company focused on discovering and developing treatments for patients suffering from debilitating neurodegenerative diseases. NeuroSense believes that these diseases, which include amyotrophic lateral sclerosis (ALS), Alzheimer's disease and Parkinson's disease, among others, represent one of the most significant unmet medical needs of our time, with limited effective therapeutic options available for patients to date. Due to the complexity of neurodegenerative diseases and based on strong scientific research on a large panel of related biomarkers, NeuroSense's strategy is to develop combined therapies targeting multiple pathways associated with these diseases.
For additional information, we invite you to visit our website and follow us on LinkedIn, YouTube and X. Information that may be important to investors may be routinely posted on our website and these social media channels.
Forward-Looking Statements
This press release contains "forward-looking statements" that are subject to substantial risks and uncertainties. All statements, other than statements of historical fact, contained in this press release are forward-looking statements. Forward-looking statements contained in this press release may be identified by the use of words such as "anticipate," "believe," "contemplate," "could," "estimate," "expect," "intend," "seek," "may," "might," "plan," "potential," "predict," "project," "target," "aim," "should," "will" "would," or the negative of these words or other similar expressions, although not all forward-looking statements contain these words. Forward-looking statements are based on NeuroSense Therapeutics' current expectations and are subject to inherent uncertainties, risks and assumptions that are difficult to predict and include statements regarding the timing of commencement of the Phase 3 trial. Further, certain forward-looking statements are based on assumptions as to future events that may not prove to be accurate. The future events and trends may not occur and actual results could differ materially and adversely from those anticipated or implied in the forward looking statements. These risks include the risk that the Phase 3 trial for PrimeC in ALS will not occur, or if it occurs, will be delayed; that the trial will not be successful; uncertainty regarding outcomes and the timing of current and future clinical trials; timing for reporting data; the ability of NeuroSense to remain listed on Nasdaq; and other risks and uncertainties set forth in NeuroSense's filings with the Securities and Exchange Commission (SEC). You should not rely on these statements as representing our views in the future. More information about the risks and uncertainties affecting NeuroSense is contained under the heading "Risk Factors" in the Annual Report on Form 20-F filed with the Securities and Exchange Commission on April 7, 2025 and NeuroSense's subsequent filings with the SEC. Forward-looking statements contained in this announcement are made as of this date, and NeuroSense undertakes no duty to update such information except as required under applicable law.
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SOURCE NeuroSense
FAQ
What did NeuroSense (NRSN) announce on November 24, 2025 about PrimeC?
How many patients will be enrolled in NeuroSense's PARAGON Phase 3 trial (NRSN)?
When does NeuroSense expect to enroll the first patient in the Phase 3 PARAGON trial?
What is the design and duration of NeuroSense's Phase 3 PARAGON trial (NRSN)?
What statistical power does PARAGON have for its primary endpoint?
When will NeuroSense provide more PARAGON trial details and timelines?
