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ZYN002

Phase 3

Fragile X Syndrome | Small molecule | Rare Disease |Harmony Biosciences Holdings, Inc.|Last Updated: Sep 1, 2026

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLED
Total Trials1
Total Enrollment215

FDA Designations

No designations recorded

Clinical trial landscape

ZYN002 · 2 trials · 3 indications

Phase 3 1Phase 2 1
NCT04977986Clinical Study of Cannabidiol in Children, Adolescents, and Young Adults With Fragile X SyndromeFragile X Syndrome
COMPLETED257 Analytics
PHASE3COMPLETED
Clinical Study of Cannabidiol in Children, Adolescents, and Young Adults With Fragile X Syndrome
Fragile X SyndromeUnlock trial analytics

Study Endpoints

Primary Endpoints

Aberrant Behavior Checklist-Community Fragile X Factor Structure (ABC-C FXS) Pre-specified Subscale 1 score in patients with complete methylation of the FMR1 gene.
Change from Baseline to Week 18

The ABC-C FXS is a standard parent/caregiver reported behavioral outcome measure for use in developmental disability clinical trials

Overall Number of Participants With Treatment-Emergent Adverse Events (TEAEs) and Treatment-Emergent Serious Adverse Events (SAEs)
From first dose of study drug administration (Day 1) up to end of the study, approximately 306 days

An adverse event (AE) is an undesirable medical occurrence or worsening of a pre-existing medical condition that occurs at any time after signing of the informed consent form whether or not it is considered to be related to treatment. Any AE that results in one or more of the following is considered a SAE: death, life threatening, in-patient hospitalization, persistent or significant disability/incapacity, congenital abnormality or birth defect, and other medically important events. TEAEs are defined as AEs with onset dates on or after the start of study drug. Adverse event data were collected as a single arm because, based on pharmacokinetics modeling, exposure is consistent between doses.

Secondary Endpoints

Aberrant Behavior Checklist-Community, Fragile X Factor Structure (ABC-C FXS) Pre-specified Subscale 2 in patients with complete methylation of the FMR1 gene.
Change from Baseline to Week 18
Change on the Caregiver Global Impression of Change (CaGI-C) for Pre-specified parameter among patients with complete methylation of the FMR1 gene.
Change from Baseline to Week 18
Clinical Global Impression- Improvement (CGI-I) scale among patients with complete methylation of the FMR1 gene.
Change from Baseline to Week 18
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
ZYN002EXPERIMENTALPharmaceutically manufactured cannabidiol, which is formulated as a clear gel for transdermal delivery.
PlaceboPLACEBO_COMPARATORPlacebo is formulated as a clear gel for transdermal delivery.
Open-labelEXPERIMENTALOpen-label

Interventions

NameTypeDescription
ZYN002DRUGPharmaceutically manufactured cannabidiol formulated as a clear gel that can be applied to the skin (transdermal delivery)
PlaceboDRUGPlacebo formulated as a clear gel that can be applied to the skin (transdermal delivery) Other Names: Placebo Comparator Matching Placebo
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Eligibility Criteria

Age Range3 Years to 29 Years
SexALL
Healthy VolunteersNo
Study Sites27

Inclusion Criteria: * Male or female children and adolescents aged 3 to \< 30 years, at the time of Screening. * Patient resides with caregiver who will continue to provide consistent care throughout the study. * Judged by the Investigator to be in generally good health at Screening based upon the ...

Countries:United StatesAustraliaIrelandNew ZealandUnited Kingdom
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Frequently asked questions about ZYN002

What is ZYN002 used for?

ZYN002 is an investigational small molecule being studied for Fragile X Syndrome and 22Q11.2 Deletion Syndrome, both rare diseases. It is administered as a transdermal gel. The drug is not approved and remains in clinical development.

Who makes ZYN002?

ZYN002 is being developed by Harmony Biosciences Holdings, Inc., traded on the NASDAQ under the ticker HRMY. The company is conducting clinical trials of the drug in Fragile X Syndrome and 22Q11.2 Deletion Syndrome.

What phase is ZYN002 in?

ZYN002 is in Phase 2 clinical development for 22Q11.2 Deletion Syndrome. A Phase 3 trial in Fragile X Syndrome has been completed. The drug is investigational and not yet approved by regulatory authorities.

What clinical trials is ZYN002 in?

ZYN002 has been studied in two completed trials. NCT04977986 was a Phase 3 study in Fragile X Syndrome with 257 participants. NCT05149898, called INSPIRE, was a Phase 2 open-label study in 22Q11.2 Deletion Syndrome with 20 participants.

Is ZYN002 the same as cannabidiol?

ZYN002 is a transdermal gel formulation of cannabidiol. The Phase 3 trial NCT04977986 is titled 'Clinical Study of Cannabidiol in Children, Adolescents, and Young Adults With Fragile X Syndrome,' indicating the drug's active ingredient is cannabidiol.