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ZYN002 - Cannabidiol

Phase 2

Fragile X Syndrome | Small molecule | Other |Harmony Biosciences Holdings, Inc.|Last Updated: May 27, 2026

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
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Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
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Trial Design
RandomizedDouble-BlindPLACEBO_CONTROLLEDBiomarker
Total Trials2
Total Enrollment688
FDA Designations
No designations recorded
Clinical Trials (2)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT03802799Open Label Extension to Assess the Long-Term Safety and Tolerability of ZYN002 in Children and Adolescents With FXSPHASE2 ACTIVE NOT_RECRUITING 476Nov 9, 2018Jun 30, 2026May 27, 202626 United States, Australia +2
NCT03614663Clinical Study Of caNNabidiol in childrEn and adolesCenTs With Fragile X (CONNECT-FX)PHASE2 COMPLETED 212Jun 12, 2018Jun 14, 2020Jul 6, 202221 United States, Australia +1
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Study Endpoints
Primary Endpoints
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
To evaluate the long-term efficacy of ZYN002 in the treatment of symptoms of FXS.
Change from baseline to end of treatment
Aberrant Behavior Checklist-Community Fragile X Factor Structure (ABC-C FXS) Irritability Subscale - Full Analysis Set
Change from baseline to end of treatment (Week 12)
Aberrant Behavior Checklist-Community, Fragile X Factor Structure (ABC-C FXS) Socially Unresponsive/Lethargic Subscale - Full Analysis Set
Change from baseline to end of treatment (Week 12)
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Study Design & Arms
AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
ZYN002EXPERIMENTALZYN002 - cannabidiol Transdermal Gel
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
ZYN002 - Cannabidiol Transdermal GelDRUGPharmaceutically manufactured. Cannabidiol formulated as a clear gel (transdermal delivery)
Placebo Transdermal GelOTHERPlacebo formulated as a clear gel (transdermal delivery)
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Eligibility Criteria
Age Range3 Years — 29 Years
SexALL
Healthy VolunteersNo
Study Sites26

Inclusion Criteria: * Participated in study ZYN2-CL-016 or Study ZYN2-CL-033. * Patients and parents/caregivers agree to abide by all study restrictions and comply with all study procedures. * Patients and parents/caregivers must be adequately informed of the nature, risks of the study, and give wr...

Countries:United StatesAustraliaNew ZealandUnited Kingdom
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Recent Changes (Last 90 Days)
MEDIUMMay 28, 2026NCT03802799Status: ENROLLING_BY_INVITATION → ACTIVE_NOT_RECRUITING
MEDIUMMay 28, 2026NCT03802799Status: ENROLLING_BY_INVITATION → ACTIVE_NOT_RECRUITING
LOWMay 26, 2026NCT03802799primaryCompletionDate: changed
LOWMay 24, 2026NCT03802799studyFirstPostDate: changed