AzTrials
AzTrials

Dravet SyndromePhase 3ORCHIDNCT06118255

A Study to Evaluate Safety, Tolerability, and Pharmacokinetics of Fenfluramine (Hydrochloride) in Infants 1 Year to Less Than 2 Years of Age With Dravet Syndrome

A Phase 3 study testing fenfluramine in people with Dravet Syndrome, run by UCB BIOSCIENCES, Inc. at 12 sites in 5 countries.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
Search all trials

Trial summary

The primary purpose of this study is evaluate the safety and tolerability of fenfluramine hydrochloride (HCl) 0.2 to 0.8 mg/kg/day in infants 1 year to less than 2 years of age with Dravet syndrome. Read more about this study

Who is it for?
Ages 1 year to 23 months
Conditions the study is for
Dravet Syndrome
What is being tested?
fenfluramine
Type of treatment
Pill or oral medicine
Could I receive a placebo?
No, everyone receives an active treatment
How many people
25 participants
Where
12 sitesin 5 countries
Study dates
21 May 2024to 1 Sep 2026
Phase
Phase 3
Are there results?
None posted in the registry

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 1 year to 23 months
  • All sexes
  • No healthy volunteers
  • Child

Who may be able to join

  • Participant is ≥1 to <2 years of age as of the day of the first administration of study drug
  • Participant has a documented diagnosis or likely diagnosis of Dravet syndrome according to the International League Against Epilepsy (ILAE) criteria and as agreed by the Epilepsy Study Consortium (ESC)
  • Participant must be currently receiving ≥1 concomitant anti seizure medication (ASM) at a stable dose for ≥4 weeks prior to the Screening Visit and is expected to remain stable throughout the study. Rescue medications for seizures are not counted towards the total number of ASMs
  • Participant must have drug resistant epilepsy as defined as a history of failure of adequate trials of 2 tolerated, appropriately chosen and used antiepileptic drug schedules (whether as monotherapies or in combination) to achieve sustained seizure freedom
  • Participants must have ≥1 countable motor seizures (CMS) during the Baseline Period. The CMS include distinct seizures of generalized tonic-clonic, bilateral clonic, focal motor, bilateral tonic, atonic (drop), bilateral tonic/atonic, or focal to bilateral tonic-clonic type. If the participant fails to have ≥1 qualifying seizures in 28 days, the Baseline Period may be extended by an additional 14 days with Sponsor approval. Participants with an extended Baseline Period must still have ≥1 CMS in the 28 days immediately prior to the day of the first administration of study drug
  • Body weight is ≥8 kg
  • Males and females

Who cannot join

  • Participant has a known hypersensitivity to fenfluramine hydrochloride (HCl) or any of the excipients in the study drug
  • Participant has an exclusionary cardiovascular or cardiopulmonary abnormality based on echocardiogram (ECHO), electrocardiogram (ECG), or physical examination and is not approved for entry by the central cardiac reader
  • Participant has a diagnosis of pulmonary arterial hypertension
  • Participant has a clinically significant medical condition, including chronic obstructive pulmonary disease, interstitial lung disease, or portal hypertension, or has had clinically relevant symptoms or a clinically significant illness currently or in the 4 weeks prior to the Screening Visit, other than epilepsy, that in the opinion of the Investigator would negatively impact study participation, collection of study data, or pose a risk to the participant
  • Participant has current or past history of cardiovascular or cerebrovascular disease, such as cardiac valvulopathy, myocardial infarction or stroke, severe ventricular arrhythmias, or clinically significant structural cardiac abnormality, including but not limited to mitral valve prolapse, atrial or ventricular septal defects, patent ductus arteriosus, and patent foramen ovale with reversal of shunt. (Note: Patent foramen ovale or a bicuspid aortic valve are not considered exclusionary.)
  • Participant has a current or past history of glaucoma
Show all 14Show fewer
  • Participant has moderate to severe hepatic impairment, assessed based on the Child-Pugh classification system
  • Participant has moderate to severe renal impairment (estimated glomerular filtration rate <50 mL/min/1.73 m^2 calculated with the updated Bedside Schwartz equation for children
  • QT interval corrected (QTc) >450 msec
  • Participant is taking >4 concomitant ASMs
  • Participant is receiving concomitant treatment with cannabidiol other than Epidiolex/Epidyolex or is being actively treated with tetrahydrocannabinol (THC) or any marijuana product for any condition
  • Participant is receiving concomitant therapy with any of the following: centrally-acting anorectic agents; monoamine-oxidase inhibitors; any centrally-acting compound with clinically appreciable amount of serotonin agonist or antagonist properties, including serotonin reuptake inhibition; other centrally-acting noradrenergic agonists, including atomoxetine; or cyproheptadine. Disallowed medications are subject to washout of ≥5 half-lives before the first day of study drug administration
  • Participant is currently receiving another investigational product(s) or has received another investigational product within 30 days or within <5 times the half-life of that investigational product, whichever is longer, prior to the Screening Visit
  • Participant has previously been treated with Fintepla (fenfluramine HCl) prior to the Screening Visit

Trial locations and contacts

12 sites in 5 countries.

12 sites in 5 countries

Italy4 sites
  • Ep0213 202

    Florence

  • Ep0213 203

    Genova

  • Ep0213 201

    Roma

  • Ep0213 204

    Roma

Other trials in Italy

United States3 sites
  • Ep0213 107

    Dallas, Texas, 75207

  • Ep0213 105

    Memphis, Tennessee, 38103-2800

  • Ep0213 103

    Seattle, Washington, 98105

Other trials in United States

Belgium2 sites
  • Ep0213 502

    Brussels

  • Ep0213 501

    Edegem

Other trials in Belgium

United Kingdom2 sites
  • Ep0213 403

    Glasgow

  • Ep0213 401

    London

Other trials in United Kingdom

Germany1 site
  • Ep0213 303

    Bielefeld

Other trials in Germany

About this study

Official title: Open-Label, Single-Arm, Phase 3 Study to Evaluate Safety, Tolerability, and Pharmacokinetics of Fenfluramine (Hydrochloride) in Infants 1 Year to Less Than 2 Years of Age With Dravet Syndrome

The primary purpose of this study is evaluate the safety and tolerability of fenfluramine hydrochloride (HCl) 0.2 to 0.8 mg/kg/day in infants 1 year to less than 2 years of age with Dravet syndrome.

Conditions
Dravet Syndrome
Being tested
fenfluramine
Keywords
Dravet syndrome, pediatrics, Fintepla, fenfluramine
Medical subject headings
Epilepsies, Myoclonic

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • fenfluramineDrug

    Also called Fintepla

    The study drug, fenfluramine HCl, is an oral solution to be administered in equal doses twice daily (BID). It will be based on the current dose and participant's weight (kg).

Study groups in NCT06118255
Study groupRoleWhat they receive
Fenfluramine Open-labelExperimentalAll study participants will initiate fenfluramine hydrochloride (HCl) treatment at 0.2 mg/kg/day in the Dose-Finding Period and may be up-titrated to a maximum of 0.8 mg/kg/day based on the Investigators discretion. The dose of fenfluramine HCl can be flexibly titrated during the Maintenance Period. Study participants, who discontinue early will participate in the Taper Period. All participants will complete an End of Treatment (EOT) Visit.
Receives: Drug: fenfluramine

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Change from Baseline in QT interval corrected by Fridericia (QTcF) at Visit 13 (End of Treatment/Early Termination (EOT/ET))

    QTcF is the QT interval corrected for heart rate according to Fridericia's formula. Higher values correspond to prolongation of QT interval.

    Measured: Week 52 (Visit 13; EOT/ET), compared to Baseline

  2. Occurrence of a treatment-emergent (ie, post-Baseline through Visit 13 [EOT/ET]) result which meets the FDA case definition of drug associated valvulopathy

    Drug associated valvulopathy refers to aortic regurgitation with severity mild or greater and/or mitral regurgitation with severity moderate or greater.

    Measured: From post-Baseline (Day 1) through Visit 13 (EOT/ET) (up to 52 weeks)

  3. Occurrence of treatment-emergent (ie, post-Baseline through Visit 13 [EOT/ET]) clinically confirmed valvular heart disease (VHD)

    Clinically confirmed VHD is an aortic regurgitation with mild or greater severity and/or a mitral regurgitation with moderate or greater severity.

    Measured: From post-Baseline (Day 1) through Visit 13 (EOT/ET) (up to 52 weeks)

  4. Change from Baseline in body weight (Z-score) at each visit

    Body weight (Z-score) refers to the number of standard deviations a participant's body weight lies from the mean, when compared to others of similar gender and age.

    Measured: Week 1 (Visit 3), Week 4 (Visit 5), Week 8 (Visit 7), Week 12 (Visit 8), Week 16 (Visit 9), Week 20 (Visit 10), Week 26 (Visit 11), Week 39 (Visit 12), Week 52 (Visit 13), Postdose Safety Follow-Up (Visit 14), compared to Baseline

  5. Change from Baseline in recumbent length (Z-score) at each visit

    Recumbent length (Z-score) refers to the number of standard deviations a participant's body weight lies from the mean, when compared to others of similar gender and age.

    Measured: Week 1 (Visit 3), Week 4 (Visit 5), Week 8 (Visit 7), Week 12 (Visit 8), Week 16 (Visit 9), Week 20 (Visit 10), Week 26 (Visit 11), Week 39 (Visit 12), Week 52 (Visit 13), Postdose Safety Follow-Up (Visit 14), compared to Baseline

  6. Occurrence of a clinically significant abnormality on the neurological examination at each visit

    A complete neurological examination will be conducted by the investigator for each participant covering cranial nerves, muscle strength and tone, reflexes, coordination, sensory function, and gait.

    Measured: Week 1 (Visit 3), Week 4 (Visit 5), Week 8 (Visit 7), Week 12 (Visit 8), Week 16 (Visit 9), Week 20 (Visit 10), Week 26 (Visit 11), Week 39 (Visit 12), Week 52 (Visit 13), Postdose Safety Follow-Up (Visit 14), compared to Baseline

Secondary outcomes (8)
  1. Percentage change from the Baseline Period (ie, Baseline) in monthly (28 days) countable motor seizure frequency (CMSF), during Weeks 9 through 20

    The percentage change from the Baseline Period (Baseline) in "monthly (28 days) countable motor seizure frequency," or CMSF, during Weeks 9 through 20

    Measured: During Weeks 9 to 20, compared to Baseline

  2. Percentage change from Baseline in CMSF during Weeks 1 through 20

    The percentage change from the Baseline Period (Baseline) in "monthly (28 days) countable motor seizure frequency," or CMSF, during Weeks 1 through 20

    Measured: During Weeks 1 to 20, compared to Baseline

  3. Percentage change from Baseline in CMSF during the Treatment Period (Week 1 through the EOT/ET Visit)

    The percentage change from the Baseline Period (Baseline) in "monthly (28 days) countable motor seizure frequency," or CMSF, during the Treatment Period (Week 1 through the EOT/ET Visit; up to 52 weeks)

    Measured: During the Treatment Period (Week 1 through EOT/ET) (up to 52 weeks), compared to Baseline

  4. Achievement of a Clinical Global Impression - Improvement (CGI-I) rating of "much improved" or "very much improved" as assessed by the Principal Investigator at Week 20

    The CGI-I rating scale permits a global evaluation of the participant's improvement over time by the investigator on a 7-point scale.

    Measured: At Week 20

  5. Achievement of a CGI-I rating of "much improved" or "very much improved" as assessed by the parent/caregiver at Week 20

    The CGI-I rating scale permits a global evaluation of the participant's improvement over time by the parent/caregiver on a 7-point scale.

    Measured: At Week 20

  6. Steady-state maximum plasma concentration (Cmax) of fenfluramine and norfenfluramine at Week 12

    Mean peak (maximum) plasma concentration of fenfluramine and norfenfluramine will be reported at Study Week 12 when participants are in the Maintenance Period.

    Measured: At Week 12

  7. Steady-state minimum plasma concentration (Cmin) of fenfluramine and norfenfluramine at Week 12

    Mean minimum plasma concentration of fenfluramine and norfenfluramine will be reported at Study Week 12 when participants are in the Maintenance Period.

    Measured: At Week 12

  8. Area under the plasma concentration time curve from time zero to 24 hours (AUC0 24) for steady-state fenfluramine and norfenfluramine at Week 12

    Mean AUC0-24 values of fenfluramine and norfenfluramine will be reported at Study Week 12 when participants are in the Maintenance Period.

    Measured: At Week 12

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted7 Nov 2023
  2. Study start21 May 2024
  3. Primary completion1 Sep 2026
  4. Study completion1 Sep 2026

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 3
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrolment
25 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT06118255
Sponsor's protocol ID
EP0213
Other IDs
2022-502359-75, U1111-1289-2867
Acronym
ORCHID
Status last verified
Sep 2026
First submitted
23 Oct 2023
Last updated
17 Sep 2026
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No
Individual data sharing
Yes: Data from this study may be requested by qualified researchers six months after product approval in the US and/or Europe, or global development is discontinued, and 18 months after trial completion. Investigators may request access to anonymized IPD and redacted study documents which may include: raw datasets, analysis-ready datasets, study protocol, blank case report form, annotated case report form, statistical analysis plan, dataset specifications, and clinical study report. Prior to use of the data, proposals need to be approved by an independent review panel at www.Vivli.org and a signed data sharing agreement will need to be executed. All documents are available in English only, for a pre-specified time, typically 12 months, on a password protected portal. This plan may change if a determination is made that the data cannot be adequately anonymized.

Questions about this trial

What is this clinical trial studying?

A Phase 3 study testing fenfluramine in people with Dravet Syndrome, run by UCB BIOSCIENCES, Inc. at 12 sites in 5 countries.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 7 inclusion and 14 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 17 Sep 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 12 sites in Italy, United States, Belgium, United Kingdom, Germany. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 3 studies compare the treatment with the current standard treatment or a placebo in a large group, to confirm how well it works and watch for side effects.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Change from Baseline in QT interval corrected by Fridericia (QTcF) at Visit 13 (End of Treatment/Early Termination (EOT/ET)) (time frame: Week 52 (Visit 13; EOT/ET), compared to Baseline). The study lists 6 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 17 Sep 2026.

Free account

Log in to keep searching

You’ve used your 3 free searches. AzTrials is free: log in or create a free account to keep searching clinical trials and save the ones you want to follow.

Create a free accountLog in