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CNSA-001

Phase 3FDA approved

Gastroparesis | Small molecule | Gastrointestinal |PTC Therapeutics, Inc.|Trials Updated: Aug 28, 2026

CNSA-001 development status

FDA approval on record Aug 7, 2025
Highest phase Phase 3 (NCT06302348)
Phase scored for PTCTPhase 2
Registered trials 2 across 1 sponsor since Oct 2018

CNSA-001 target and mechanism

ModalitySmall molecule

Also known as sepiapterin

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLED
Total Trials2
Total Enrollment77

FDA Designations

No designations recorded

CNSA-001 clinical trials

CNSA-001 · 2 trials · 2 indications

Phase 3 1Phase 2 1
NCT06302348A Study of Sepiapterin in Participants With Phenylketonuria (PKU)Phenylketonuria
RECRUITING56 Analytics
PHASE3RECRUITING
A Study of Sepiapterin in Participants With Phenylketonuria (PKU)
PhenylketonuriaUnlock trial analytics

Study Endpoints

Primary Endpoints

Mean Change From Baseline in Full-scale Intelligence Quotient (FSIQ) Wechsler Preschool and Primary Scale of Intelligence - Fourth Edition (WPPSI-IV) Score
Baseline, Year 2

Analysis for participants ≥30 months to \<6 years of age.

Mean Change From Baseline in FSIQ Wechsler Intelligence Scale for Children - Fifth Edition (WISC-V) Score
Baseline, Year 2

Analysis for participants ≥6 years to 16 years of age.

Change From Baseline (Day 1) in Maximal Tolerated Volume Consumed During the Nutrient Satiety Test at Day 14
Baseline (Day 1), Day 14

Participants consumed 150 milliliters (mL) of Ensure™ every 5 minutes for the nutrient satiety test. At 5-minute intervals, participants scored their fullness using a rating scale that combines verbal descriptors on a scale graded 0 to 5 (0 = no symptoms, 1 = first sensation of fullness \[threshold\], 2 = mild, 3 = moderate, 4 = severe and 5 = maximum or unbearable fullness). Participants were told to stop when a score of 5 was obtained. The actual volume of Ensure™ consumed at this point was the maximum tolerated volume.

Change From Baseline (Day 1) in Maximal Tolerated Volume Consumed During the Nutrient Satiety Test at Day 28
Baseline (Day 1), Day 28

Participants consumed 150 mL of Ensure™ every 5 minutes for the nutrient satiety test. At 5-minute intervals, participants scored their fullness using a rating scale that combines verbal descriptors on a scale graded 0 to 5 (0: no symptoms, 1 = first sensation of fullness \[threshold\], 2 = mild, 3 = moderate, 4 = severe and 5 = maximum or unbearable fullness). Participants were told to stop when a score of 5 was obtained. The actual volume of Ensure™ consumed at this point was the maximum tolerated volume.

Secondary Endpoints

Change From Baseline in Phenylketonuria-Quality of Life (PKU-QOL) Questionnaire Score
Baseline up to 4 years
Change From Baseline in the European Quality of Life - 5 Dimensions (EQ-5D) Score
Baseline up to 4 years
Mean Change From Baseline in FSIQ (WPPSI-IV) Score
Baseline, Year 4
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
SepiapterinEXPERIMENTALParticipants will receive age- and weight-adjusted doses of sepiapterin orally once daily for up to 6 years.
CNSA-001EXPERIMENTALParticipants will receive CNSA-001 20 mg/kg/day (10 mg/kg twice daily \[BID\]) as an oral suspension for 14 days.
PlaceboPLACEBO_COMPARATORParticipants will receive placebo matching to CNSA-001 BID for 14 days.

Interventions

NameTypeDescription
SepiapterinDRUGSepiapterin powder for oral use will be mixed in water or apple juice prior to administration.
CNSA-001DRUGCNSA-001 Powder for Suspension
PlaceboDRUGPlacebo Suspension
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Eligibility Criteria

Age RangeN/A to 9 Years
SexALL
Healthy VolunteersNo
Study Sites10

Key Inclusion Criteria: For all participants: * Women of childbearing potential must have a negative pregnancy test at Screening and agree to abstinence or the use of at least one highly effective form of contraception for the duration of the study, and for at least 90 days after the last dose of ...

Countries:United StatesAustraliaFranceIrelandPolandUnited Kingdom
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Competitive Landscape -Gastroparesis 2 trials

Top 1 of 2 competitors

CompanyTickerTrialsLead PhaseDrugs
Vanda Pharmaceuticals Inc.VNDA1PHASE4Tradipitant
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Recent Changes (Last 90 Days)

LOWAug 28, 2026NCT06302348lastUpdatePostDate: changed
LOWAug 28, 2026NCT06302348lastUpdatePostDate: changed
LOWJul 24, 2026NCT06302348lastUpdatePostDate: changed
LOWJul 24, 2026NCT06302348lastUpdatePostDate: changed

Frequently asked questions about CNSA-001

What is CNSA-001 used for?

CNSA-001 is an investigational small molecule being developed for the treatment of gastroparesis, a condition where the stomach cannot empty properly. It is being studied specifically in women with diabetic gastroparesis. The drug is not yet approved and remains in clinical development.

Who makes CNSA-001?

CNSA-001 is being developed by PTC Therapeutics, Inc., a biopharmaceutical company traded on NASDAQ under the ticker PTCT. The company is conducting clinical research to evaluate the drug's safety and efficacy in patients with gastroparesis.

What phase is CNSA-001 in?

CNSA-001 is in Phase 2 clinical development. A Phase 2 study of the drug has been completed, but it remains investigational and has not received regulatory approval. Further clinical development would be needed before it could be considered for approval.

What clinical trials is CNSA-001 in?

CNSA-001 has one completed clinical trial, registered as NCT03712124, titled "A Study of CNSA-001 in Women With Diabetic Gastroparesis." This Phase 2 study enrolled 21 female participants aged 18 years and older in the United States. The trial was randomized, double-blind, and placebo-controlled.

Is CNSA-001 the same as any other drug?

CNSA-001 is the primary name used for this investigational drug in clinical trials. No alternative names have been reported for this compound. It is distinct from other drugs in development and is being studied specifically for gastroparesis.