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PrimeC

Phase 2

Amyotrophic Lateral Sclerosis | Small Molecules | Neurology |NeuroSense Therapeutics Ltd.|Trials Updated: Sep 5, 2025

PrimeC development status

Highest phase Phase 2
Registered trials 2 across 1 sponsor since May 2022

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLED
Total Trials1
Total Enrollment69

FDA Designations

ORPHAN_DRUG

PrimeC clinical trials

PrimeC · 1 trial · 2 indications

Phase 2 1
NCT05357950A Phase IIb, Multi-Center, Multinational, Double-Blind, Placebo-Controlled Study, With an Open Label Extension, to Evaluate Safety, Tolerability and Efficacy of PrimeC in Subjects With ALSAmyotrophic Lateral Sclerosis
COMPLETED69 Analytics
PHASE2COMPLETED
A Phase IIb, Multi-Center, Multinational, Double-Blind, Placebo-Controlled Study, With an Open Label Extension, to Evaluate Safety, Tolerability and Efficacy of PrimeC in Subjects With ALS
Amyotrophic Lateral SclerosisUnlock trial analytics

Study Endpoints

Primary Endpoints

Incidence and severity of treatment-emergent adverse events (TEAEs)
6 months

Treatment emergent adverse event is any medical event associated with the drug

Number of subjects who discontinued treatment prematurely
6 months

Number of subjects whose treatment is stopped prematurely for any reason

Number of patients who discontinued treatment prematurely due to adverse events
6 months

Number of patients whose treatment is stopped prematurely specifically due to adverse events

Number of patients with clinically significant abnormal laboratory values
6 months
The mean difference between PrimeC and Placebo in serum concentration of NDE TDP-43 at month 6
6 months
The mean difference between PrimeC and placebo in serum concentration of NDE PgJ2 at month 6
6 months

Secondary Endpoints

Change from baseline to 6 months in ALS functional rating scale - revised (ALSFRS-R)
6 months
Change from baseline to 6 months in slow vital capacity (SVC)
6 months
Change from baseline to 6 months in quality of life ALSSQOL-SF
6 months
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
PrimeCACTIVE_COMPARATOR2 tablets of PrimeC administered twice daily (4 tablets a day), at a daily dose of 1496 mg
PlaceboPLACEBO_COMPARATOR2 tablets of Placebo administered twice daily (4 tablets a day). Placebo tablets are matched in size, color and taste.

Interventions

NameTypeDescription
PrimeCDRUGCiprofloxacin and celecoxib combination extended release formulation
PlaceboDRUGPlacebo matches active drug in size, color and taste
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Eligibility Criteria

Age Range18 Years to 75 Years
SexALL
Healthy VolunteersNo
Study Sites4

Inclusion Criteria: 1. Able to comprehend and willing to sign an informed consent form (ICF) 2. Males or females between the ages of 18 and 75 years of age, inclusive 3. Diagnosis of familial or sporadic ALS (defined as meeting the laboratory-supported probable, probable, or definite criteria for a...

Countries:CanadaIsraelItaly
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Frequently asked questions about PrimeC

What is PrimeC used for?

PrimeC is an investigational oral small molecule therapy being developed for amyotrophic lateral sclerosis (ALS), a progressive neurodegenerative disease. It is not approved for any indication and remains in clinical development. NeuroSense Therapeutics is evaluating it as a potential disease-modifying treatment for people living with ALS.

Who is developing PrimeC?

PrimeC is being developed by NeuroSense Therapeutics Ltd., a clinical-stage biotechnology company that trades under the ticker NRSN. The company is advancing PrimeC as its lead candidate in neurology, specifically for amyotrophic lateral sclerosis, and holds an orphan drug designation from the FDA for this program.

What phase is PrimeC in?

PrimeC has completed a Phase 2b clinical trial in ALS. It is an investigational therapy and has not been approved by the FDA or any other regulatory agency. NeuroSense Therapeutics has not yet reported a subsequent pivotal trial for the program.

What clinical trials is PrimeC in?

PrimeC has been studied in one completed Phase 2b trial, NCT05357950, titled a Phase IIb, multi-center, multinational, double-blind, placebo-controlled study with an open label extension to evaluate safety, tolerability and efficacy in subjects with ALS. The trial enrolled 69 participants across Canada, Israel and Italy.

Has PrimeC received any FDA designations?

PrimeC has received orphan drug designation from the FDA for the treatment of amyotrophic lateral sclerosis. Orphan drug designation is granted to therapies intended for rare diseases affecting fewer than 200,000 people in the United States. It does not constitute approval, and PrimeC remains investigational.