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EDG-5506

Phase 2

Becker Muscular Dystrophy | Small molecule | Rare Disease |Edgewise Therapeutics, Inc.|Trials Updated: Sep 21, 2026

EDG-5506 development status

Highest phase Phase 2 (NCT06066580)
Phase scored for EWTXPhase 1
Registered trials 5 across 1 sponsor since Oct 2020

EDG-5506 target and mechanism

ModalitySmall molecule

Also known as EDG-5506 Tablet, Sevasemten

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindCONTROLLEDDMC
Total Trials8
Total Enrollment787

FDA Designations

No designations recorded

EDG-5506 clinical trials

EDG-5506 · 8 trials · 10 indications

Phase 2 4Phase 1 4
NCT06100887Phase 2 Study of EDG-5506 in Children and Adolescents With Duchenne Muscular Dystrophy Previously Treated With Gene TherapyDuchenne Muscular Dystrophy
ACTIVE NOT_RECRUITING43 Analytics
NCT06066580Open-Label Extension of EDG-5506 in Participants With Becker Muscular DystrophyBecker Muscular Dystrophy
ENROLLING BY_INVITATION260 Analytics
NCT05291091Phase 2 Study of EDG-5506 in Becker Muscular Dystrophy (GRAND CANYON)Becker Muscular Dystrophy
COMPLETED244 Analytics
NCT05540860A Study of EDG-5506 in Children With Duchenne Muscular Dystrophy (LYNX)Duchenne Muscular Dystrophy
ACTIVE NOT_RECRUITING76 Analytics
PHASE2ACTIVE NOT_RECRUITING
Phase 2 Study of EDG-5506 in Children and Adolescents With Duchenne Muscular Dystrophy Previously Treated With Gene Therapy
Duchenne Muscular DystrophyUnlock trial analytics
PHASE2ENROLLING BY_INVITATION
Open-Label Extension of EDG-5506 in Participants With Becker Muscular Dystrophy
Becker Muscular DystrophyUnlock trial analytics
PHASE2COMPLETED
Phase 2 Study of EDG-5506 in Becker Muscular Dystrophy (GRAND CANYON)
Becker Muscular DystrophyUnlock trial analytics
PHASE2ACTIVE NOT_RECRUITING
A Study of EDG-5506 in Children With Duchenne Muscular Dystrophy (LYNX)
Duchenne Muscular DystrophyUnlock trial analytics

Study Endpoints

Primary Endpoints

Number of adverse events during treatment with sevasemten or placebo
36 months

All participants

Severity of adverse events during treatment with sevasemten or placebo
36 months

All participants

Number of adverse events in those treated with sevasemten
55 Months
Severity of adverse events in those treated with sevasemten
55 Months
Number of treatment emergent adverse events in those treated with sevasemten or placebo
12 months (CANYON Cohorts 1, 2, 4, 5), 18 months (GRAND CANYON Cohort 6)

All participants

Severity of treatment emergent adverse events in those treated with sevasemten or placebo
12 months (CANYON Cohorts 1, 2, 4, 5), 18 months (GRAND CANYON Cohort 6)

All participants

Change from Baseline in serum Creatine Kinase
Averaged across Months 6, 9, 12 Months (CANYON Cohorts 1, 2)

Adult participants

Change from Baseline in total North Star Ambulatory Assessment score
18 months (GRAND CANYON Cohort 6)

Adult participants

The mass balance of EDG-5506 as measured by the total radioactivity recovered in urine
Up to 37 days
The mass balance of EDG-5506 as measured by the total radioactivity recovered in feces
Up to 37 days
Plasma maximum measured drug concentration (Cmax) measurements for EDG-5506
Up to 37 days
Characterization of EDG-5506 as measured by urinary recovery (fet1-t2)
Up to 37 days
Absolute bioavailability of EDG-5506 as measured by Fabs
Up to 9 days
Difference in area under the concentration-time curve (AUC0-24, AUC0-26, AUC0-144 and AUC0-t) measurements for EDG-5506 in blood collected by capillary blood self-sampling versus venous blood sampling
7 days
Plasma maximum measured drug concentration (Cmax) measurements for EDG-5506 in blood collected by capillary blood self-sampling versus venous blood sampling
7 days
Time of maximum concentration (Tmax) measurements for EDG-5506 in blood collected by capillary blood self-sampling versus venous blood sampling
7 days
Percentage of Participants Treated With Sevasemten Experiencing AEs
From first dose of study drug to 25 months

An AE is any untoward medical occurrence in a patient administered a medicinal product. The AE does not necessarily have to have a causal relationship with the study drug. An AE can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding, for example), symptom or disease temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product. The numerator of the percentage is the number of participants experiencing at least one AE after first dose of study drug up to 25 months.

Frequency of AEs in Those Treated With Sevasemten
From first dose of study drug to 25 months

An AE is any untoward medical occurrence in a patient administered a medicinal product. The AE does not necessarily have to have a causal relationship with the study drug. An AE can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding, for example), symptom or disease temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product. The endpoint is the cumulative total number of AEs occurring after first dose of study drug up to 25 months among participants who received at least one dose of study drug.

Number of Participants Treated With Sevasemten With AEs by Maximum Severity
From first dose of study drug to 25 months

An AE is any untoward medical occurrence in a patient administered a medicinal product. The AE does not necessarily have to have a causal relationship with the study drug. An AE can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding, for example), symptom or disease temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product. The severity of an AE is graded, according to the study protocol definitions of AE severity/intensity, as "mild", "moderate" or "severe". Participants who reported multiple AEs are counted only once at the highest severity reported.

Incidence, frequency, severity and dose-relationship of adverse events
Up to 42 days of monitoring
Incidence of abnormal laboratory test results (clinical chemistry, hematology, urinalysis, coagulation)
Up to 42 days of monitoring
Incidence of treatment-emergent clinically abnormal electrocardiogram (ECG)
Up to 42 days of monitoring
Incidence of abnormal vital signs
Up to 42 days of monitoring
Incidence of abnormal physical exam findings
Up to 42 days of monitoring

Secondary Endpoints

Incidence of laboratory test-related treatment emergent adverse events
36 months
Pharmacokinetics as measured by steady state plasma concentration
36 months
Change from Baseline in serum creatine kinase
12 weeks
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Cohort 1EXPERIMENTALDrug: Sevasemten Drug: Placebo
Cohort 2EXPERIMENTALDrug: Sevasemten Drug: Placebo
Cohort 3EXPERIMENTALDrug: Sevasemten Drug: Placebo
TreatmentEXPERIMENTALDrug: Sevasemten
Adult Cohort 1EXPERIMENTALDrug: Sevasemten Drug: Placebo
Adult Cohort 2EXPERIMENTALDrug: Sevasemten Drug: Placebo
Adult Cohort 6EXPERIMENTALDrug: Sevasemten Drug: Placebo
Adolescent Cohort 4EXPERIMENTALDrug: Sevasemten Drug: Placebo
Adolescent Cohort 5EXPERIMENTALDrug: Sevasemten Drug: Placebo
Cohort 4EXPERIMENTALDrug: Sevasemten Drug: Placebo
Cohort 5EXPERIMENTALDrug: Sevasemten Drug: Placebo
Cohort 2NSEXPERIMENTALDrug: Sevasemten Drug: Placebo
Part A - AMEEXPERIMENTALEvaluation of absorption, metabolism, excretion and pharmacokinetics of a single oral dose of radiolabeled EDG-5506 in healthy male volunteers
Part B - aBAEXPERIMENTALEvaluation of bioavailability of a single oral dose of EDG-5506 followed by a single intravenous dose of radiolabeled EDG-5506 in healthy male volunteers
Healthy Volunteer: Single Ascending DoseEXPERIMENTALSingle oral ascending dose in healthy volunteers Interventions: Drug: EDG-5506 Drug: Placebo
Healthy Volunteer: Multiple Ascending DoseEXPERIMENTALMultiple oral ascending doses in healthy volunteers Interventions: Drug: EDG-5506 Drug: Placebo
Becker Muscular Dystrophy: Multiple Ascending DoseEXPERIMENTALMultiple oral ascending doses in adults with Becker muscular dystrophy Interventions: Drug: EDG-5506 Drug: Placebo

Interventions

NameTypeDescription
Sevasemten Dose 1DRUGSevasemten is administered orally once per day
Sevasemten Dose 2DRUGSevasemten is administered orally once per day
Sevasemten Dose 3DRUGSevasemten is administered orally once per day
PlaceboDRUGPlacebo is administered orally once per day
SevasemtenDRUGSevasemten is administered orally once per day
Sevasemten 10 mgDRUGSevasemten is administered orally once per day
Sevasemten 5 mgDRUGSevasemten is administered orally once per day
Sevasemten 12.5 mgDRUGSevasemten is administered orally once per day
Sevasemten Dose 4DRUGSevasemten is administered orally once per day
Sevasemten Dose 5DRUGSevasemten is administered orally once per day
EDG-5506 TabletDRUGSingle Oral Dose - Tablet
Radiolabeled EDG-5506 SuspensionDRUGSingle Oral Dose
Radiolabeled EDG-5506 IntravenousDRUGSingle Intravenous Dose
EDG-5506DRUGsingle oral dose
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Eligibility Criteria

Age Range6 Years to 17 Years
SexMALE
Healthy VolunteersNo
Study Sites7

Key Inclusion Criteria: * Aged 6 to 17 with a documented mutation on the DMD gene and phenotype consistent with DMD. * Prior receipt of an AAV-based gene therapy (≥ 2 years after documented receipt of gene therapy administration or ≥ 3 years after randomization in a randomized study). * Able to com...

Countries:United StatesAustraliaBelgiumDenmarkFranceGermanyIsraelItalyNetherlandsNew ZealandSpainUnited Kingdom
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Recent Changes (Last 90 Days)

HIGHSep 21, 2026NCT05291091Status: ACTIVE_NOT_RECRUITING → COMPLETED
HIGHSep 21, 2026NCT05291091Status: ACTIVE_NOT_RECRUITING → COMPLETED
LOWSep 17, 2026NCT06066580lastUpdatePostDate: changed
LOWSep 17, 2026NCT06066580lastUpdatePostDate: changed
LOWJul 31, 2026NCT06066580lastUpdatePostDate: changed
LOWJul 31, 2026NCT05291091lastUpdatePostDate: changed
LOWJul 31, 2026NCT06066580lastUpdatePostDate: changed
LOWJul 31, 2026NCT05291091lastUpdatePostDate: changed

Frequently asked questions about EDG-5506

What is EDG-5506?

EDG-5506 is an investigational small molecule being developed by Edgewise Therapeutics, Inc. for Becker muscular dystrophy and other muscular dystrophies. It is in Phase 1 clinical development and has been studied in healthy volunteers and adults with Becker muscular dystrophy. It is also referred to as EDG-5506 Tablet.

What is EDG-5506 used for in Becker muscular dystrophy?

EDG-5506 is being developed for Becker muscular dystrophy, a rare genetic muscle disorder, and for muscular dystrophies more broadly. It is an investigational therapy in Phase 1 development and has not been approved for any indication. Clinical work to date includes healthy volunteers and adults with Becker muscular dystrophy.

Who makes EDG-5506?

EDG-5506 is developed by Edgewise Therapeutics, Inc., which trades under the ticker EWTX. The company is advancing the small molecule for Becker muscular dystrophy and related muscular dystrophies as part of its rare disease pipeline.

What phase is EDG-5506 in?

EDG-5506 is in Phase 1 clinical development. It is investigational and has not been approved by the FDA for any indication. Two completed Phase 1 trials are registered, and no active trials are currently listed for the program.

What clinical trials is EDG-5506 in?

EDG-5506 has been evaluated in completed Phase 1 trials, including NCT04585464, which assessed safety, tolerability, and pharmacokinetics in healthy volunteers and adults with Becker muscular dystrophy, and NCT05730842, which studied absorption, metabolism, excretion, and absolute bioavailability in healthy volunteers. A third study, NCT05492734, assessed non-invasive dried blood sampling.

Is EDG-5506 the same as EDG-5506 Tablet?

Yes, EDG-5506 Tablet is an alternative name for EDG-5506, the investigational small molecule from Edgewise Therapeutics, Inc. Both names refer to the same Phase 1 asset being developed for Becker muscular dystrophy and other muscular dystrophies.