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QRX003, 4%

Phase 2

Netherton Syndrome | Small molecule | Rare Disease |Quoin Pharmaceuticals, Ltd.|Last Updated: Aug 31, 2026

Target and mechanism

ModalitySmall molecule

Also known as QRX003, 4% Lotion, QRX003

Success Probability

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Market & Valuation

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Trial Design

CONTROLLED
Total Trials3
Total Enrollment44

FDA Designations

ORPHAN_DRUGFAST_TRACKRARE_PEDIATRIC_DISEASE

Clinical trial landscape

QRX003, 4% · 3 trials · 1 indication

Phase 2 3
NCT07538583Phase 2/3 Clinical Study of QRX003 Lotion in Subjects With Netherton SyndromeNetherton Syndrome
RECRUITING16 Analytics
NCT06953466Clinical Study of QRX003 Lotion in Subjects With Netherton SyndromeNetherton Syndrome
RECRUITING8 Analytics
NCT05789056Open Label, Safety and Efficacy Study of QRX003 Lotion in Subjects With Netherton SyndromeNetherton Syndrome
RECRUITING20 Analytics
PHASE2RECRUITING
Phase 2/3 Clinical Study of QRX003 Lotion in Subjects With Netherton Syndrome
Netherton SyndromeUnlock trial analytics
PHASE2RECRUITING
Clinical Study of QRX003 Lotion in Subjects With Netherton Syndrome
Netherton SyndromeUnlock trial analytics
PHASE2RECRUITING
Open Label, Safety and Efficacy Study of QRX003 Lotion in Subjects With Netherton Syndrome
Netherton SyndromeUnlock trial analytics

Study Endpoints

Primary Endpoints

Proportion of subjects with 1-point reduction on IGA
Week 12

The IGA (Investigator Global Assessment) is a 5-point scale used to assess the overall severity of a Subject's NS condition.

Proportion of subjects with 2-point reduction on IGA
Up to week 16

Proportion of subjects with 2-point reduction in IGA from Baseline.

NS surface area change
Up to week 16

Change from Baseline in total Body Surface Area (BSA) affected by NS in the Treatment Area

WI-NRS score change
Up to week 16

Change from Baseline in the Worst Itch-Numeric Rating Scale (WI-NRS) score ≥4. Itch severity is graded on an 11-point scale where 0 represents "no itch" and 10 represents "worst itch imaginable".

Assessment of subject satisfaction with treatment based on TSQM
Up to week 16

Assessment of subject satisfaction with treatment based on the Treatment Satisfaction Questionnaire for Medication (TSQM). The TSQM measures a subject's level of satisfaction or dissatisfaction with the treatment. Composite scores can range from 0 to 100; higher scores indicate better satisfaction.

Proportion of subjects requiring rescue therapy
Up to week 16
Safety Assessment-AEs
Up to week 16

Any local and systemic AEs (Adverse Events)/serious AEs

Safety Assessment-LSRs
Up to week 16

Number of subjects with presence of the following LSRs (Local Skin Reactions): edema, excoriations, oozing/vesiculation/crusting, and erosions at any study visit.

Secondary Endpoints

Proportion of subjects with 2-point improvement on the WI-NRS
Week 12
PGI-C Score
Week 12
CGI-C Score
Week 12
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
QRX003 lotion, 4% BIDEXPERIMENTALSubjects will apply test article twice daily (BID) for 12 weeks
QRX003, 4% BIDEXPERIMENTALSubjects will apply test article twice daily (BID) for 12 weeks
QRX003, 4% QAMEXPERIMENTALSubjects will apply test article once daily in the morning (QAM) for 12 weeks

Interventions

NameTypeDescription
QRX003DRUGSerine Protease Inhibitor
QRX003, 4% LotionDRUGQRX003 Topical Lotion containing 4% active drug (serine protease inhibitor)
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Eligibility Criteria

Age Range4 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites5

Inclusion Criteria: 1. Participant is male or female and at least 4 years of age. 2. Participant has provided written informed consent/assent. Based on the participant's age and local regulations , a participant under legal age of consent must provide written informed assent and be accompanied by t...

Countries:United States
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Recent Changes (Last 90 Days)

MEDIUMAug 31, 2026NCT05789056primaryCompletionDate: changed
MEDIUMAug 31, 2026NCT06953466primaryCompletionDate: changed
MEDIUMAug 31, 2026NCT05789056primaryCompletionDate: changed
MEDIUMAug 31, 2026NCT06953466primaryCompletionDate: changed

Frequently asked questions about QRX003, 4%

What is QRX003 used for?

QRX003 is an investigational small molecule lotion being studied for the treatment of Netherton Syndrome, a rare genetic skin disorder. It is currently in Phase 2 clinical development and has not been approved by the FDA.

What does QRX003 target?

QRX003 is a small molecule lotion developed for Netherton Syndrome. Its specific molecular target has not been disclosed in available clinical trial information, so its precise mechanism of action is not publicly detailed.

Who makes QRX003?

QRX003 is being developed by Quoin Pharmaceuticals, Ltd., a biopharmaceutical company traded on the NASDAQ under the ticker symbol QNRX. The company is conducting clinical trials of QRX003 in the United States.

What phase is QRX003 in?

QRX003 is currently in Phase 2 clinical development for Netherton Syndrome. It has received Orphan Drug, Fast Track, and Rare Pediatric Disease designations from the FDA, but it remains investigational and is not yet approved.

What clinical trials is QRX003 in?

QRX003 is being evaluated in three recruiting Phase 2 trials in the United States: NCT05789056 (20 participants, ages 14 and older), NCT06953466 (8 participants, ages 14 and older), and NCT07538583 (16 participants, ages 4 and older). All three are open-label, controlled studies in Netherton Syndrome.

Is QRX003 the same as QRX003, 4% Lotion?

Yes, QRX003 is also known as QRX003, 4% Lotion. The 4% formulation is the strength being tested in clinical trials for Netherton Syndrome.