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PrimeC

Phase 2

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

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

Clinical trial landscape

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 small molecule being developed for amyotrophic lateral sclerosis (ALS), a progressive neurodegenerative disease. It has been studied in a Phase 2b clinical trial for ALS, and it has also been evaluated in pharmacokinetic studies in healthy volunteers. PrimeC has received orphan drug designation from the FDA.

How does PrimeC work?

PrimeC is a combination of two approved drugs, ciprofloxacin and celecoxib. It is thought to work by targeting multiple pathways involved in ALS, including reducing neuroinflammation and modulating RNA processing. The exact mechanism of action is not fully understood, but it is believed to have a synergistic effect in slowing disease progression.

Who is developing PrimeC?

PrimeC is being developed by NeuroSense Therapeutics Ltd., a biopharmaceutical company focused on developing treatments for neurodegenerative diseases. NeuroSense Therapeutics is publicly traded on the Nasdaq under the ticker symbol NRSN.

What phase is PrimeC in?

PrimeC has completed a Phase 2b clinical trial for ALS. The trial was a multi-center, multinational, double-blind, placebo-controlled study with an open-label extension. The drug is still in clinical development and is not yet approved by the FDA for any indication.

What clinical trials is PrimeC in?

PrimeC has been studied in two completed clinical trials. The main efficacy trial is NCT05357950, a Phase 2b study in patients with ALS. Additionally, two Phase 1 pharmacokinetic studies, NCT05232461 and NCT05436678, were conducted in healthy volunteers to evaluate the drug's absorption and bioavailability.

Is PrimeC the same as ciprofloxacin and celecoxib?

PrimeC is a fixed-dose combination of ciprofloxacin and celecoxib, two existing drugs. It is not the same as either drug alone, but rather a proprietary combination being developed specifically for ALS. The combination is designed to provide a synergistic effect that may be more effective than either drug alone.