Recent Updates
Recently added Catalysts

ZYN002

Phase 3

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

ZYN002 development status

Highest phase Phase 3
Registered trials 2 across 1 sponsor since Jul 2021

ZYN002 target and mechanism

Molecular targetcannabinoid receptors
Target classReceptors
ModalitySmall molecule

Also known as ZYN002 - Cannabidiol Transdermal Gel, ZYN002- Cannabidiol, Cannabidiol Transdermal Gel

Success Probability

Subscribe to view

Market & Valuation

Subscribe to view

Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLED
Total Trials4
Total Enrollment965

FDA Designations

No designations recorded

ZYN002 clinical trials

ZYN002 · 4 trials · 3 indications

Phase 3 1Phase 2 3
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.

To evaluate the long-term safety and tolerability of ZYN002 administered as a transdermal gel formulation.
Up to 96 month.

Safety assessment will include collection of any treatment emergent adverse events

Aberrant Behavior Checklist-Community Fragile X Factor Structure (ABC-C FXS) Social Avoidance Subscale - Full Analysis Set
Change from Baseline to end of treatment (Week 12)

The Aberrant Behavior Checklist-Community is a standard parent/caregiver reported behavioral outcome measure for use in developmental disability clinical trials. The range for score for the subscale is from 0 to 12, and a higher value indicates a worse outcome.

Aberrant Behavior Checklist-Community Fragile X Factor Structure (ABC-C FXS) Social Avoidance Subscale - Ad Hoc Analysis
Change from baseline to end of treatment (Week 12)

The Aberrant Behavior Checklist-Community is a standard parent/caregiver reported behavioral outcome measure for use in developmental disability clinical trials. The range for score for the subscale is from 0 and 12, and the higher score means a worse outcome.

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
Unlock Study Endpoints

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
ZYN002 - Cannabidiol transdermal gelEXPERIMENTALZYN002 supplied as a transdermal gel. Patients weighing less than or equal to 35 kg will be randomized to receive either 125 mg cannabidiol Q12H or placebo. Patients weighing greater than 35 kg will be randomized to receive 250 mg cannabidiol Q12H or placebo.
Placebo transdermal gelPLACEBO_COMPARATORMatching ZYN002 placebo supplied as a transdermal gel.

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
ZYN002 - Cannabidiol Transdermal GelDRUGPharmaceutically manufactured. Cannabidiol formulated as a clear gel (transdermal delivery)
Placebo Transdermal GelOTHERPlacebo formulated as a clear gel (transdermal delivery)
Unlock Study Design Details

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
Unlock Eligibility Criteria

Recent Changes (Last 90 Days)

MEDIUMOct 2, 2026NCT04977986TRIAL_REMOVED: changed
MEDIUMOct 2, 2026NCT04977986TRIAL_REMOVED: changed
MEDIUMOct 2, 2026NCT04977986TRIAL_REMOVED: changed

Frequently asked questions about ZYN002

What is ZYN002?

ZYN002 is an investigational small molecule cannabidiol transdermal gel developed by Harmony Biosciences for rare disease indications. It is being studied in 22Q11.2 Deletion Syndrome and Fragile X Syndrome. ZYN002 is applied as a gel rather than taken orally, and it remains in clinical development rather than being an approved medicine.

What does ZYN002 target?

ZYN002 targets cannabinoid receptors. Its active ingredient is cannabidiol, delivered through the skin as a transdermal gel. By acting on cannabinoid receptors, the drug is designed to engage the endocannabinoid system, which is the biological pathway under study in the Fragile X Syndrome and 22Q11.2 Deletion Syndrome programs.

Who makes ZYN002?

ZYN002 is developed by Harmony Biosciences Holdings, Inc., which trades on Nasdaq under the ticker HRMY. Harmony Biosciences is the sponsor of the clinical program studying the cannabidiol transdermal gel in Fragile X Syndrome and 22Q11.2 Deletion Syndrome.

What phase is ZYN002 in?

ZYN002 is in Phase 2 development overall, though its Fragile X Syndrome program has included a completed Phase 3 study. The 22Q11.2 Deletion Syndrome work is at Phase 2. ZYN002 is investigational and is not an approved therapy; it continues in clinical development for these rare disease indications.

What clinical trials is ZYN002 in?

ZYN002 has been studied across several trials. These include the Phase 2 INSPIRE study in 22Q11.2 Deletion Syndrome (NCT05149898), the Phase 3 Fragile X Syndrome study (NCT04977986), the CONNECT-FX Phase 2 trial in Fragile X Syndrome (NCT03614663), and an active long-term open-label extension (NCT03802799).

Is ZYN002 the same as cannabidiol transdermal gel?

Yes. ZYN002 is also known as ZYN002 - Cannabidiol Transdermal Gel and ZYN002 - Cannabidiol. These names refer to the same investigational product: a cannabidiol formulated as a gel applied to the skin. Readers searching for cannabidiol transdermal gel in Fragile X Syndrome or 22Q11.2 Deletion Syndrome are looking at the same Harmony Biosciences asset.