A Clinical Trial for Participants With DEE to Assess Efficacy, Safety, Tolerability, and PK of Relutrigine

Purpose

A Phase 3, Randomized, Multi-Center, Double-Blind, Placebo-Controlled Clinical Trial to Evaluate the Efficacy, Safety, Tolerability, and Pharmacokinetics of Relutrigine in Participants with Developmental and Epileptic Encephalopathies Followed by an Open-Label Extension

Condition

  • Developmental and Epileptic Encephalopathy 1

Eligibility

Eligible Ages
Between 2 Years and 65 Years
Eligible Sex
All
Accepts Healthy Volunteers
No

Inclusion Criteria

  • Has a documented diagnosis of a developmental and epileptic encephalopathy. - Onset of seizures <12 years old. - Has a weight >7 kg at the time of signing consent/assent.

Exclusion Criteria

  • Has a history of left bundle branch block, arrhythmias, Brugada syndrome, congenital heart disease, familial short QT syndrome, or family history of sudden death or ventricular arrhythmias, including idiopathic ventricular fibrillation. - Had 2 or more episodes of convulsive status epilepticus requiring hospitalization and intubation in the 6 months prior to Screening. - Has an abnormal ECG reading, including a QT interval corrected for heart rate using Bazett's method (QTcB) <350 and >450 ms (males), or <360 and >460 ms (females) at Screening and/or on Day 1. - Any nerve stimulation must have been placed at least 3 months prior to Screening with at least 1 month of stable settings prior to Screening. - Has received any other experimental or investigational drug, device, or other therapy within 30 days or 5 half-lives (whichever is longer) prior to Screening, including any prior use of gene therapy. - Is currently pregnant or breastfeeding or is planning to become pregnant during the clinical trial or within 5 half-lives of the last study drug dose.

Study Design

Phase
Phase 3
Study Type
Interventional
Allocation
Randomized
Intervention Model
Sequential Assignment
Primary Purpose
Treatment
Masking
Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)

Arm Groups

ArmDescriptionAssigned Intervention
Experimental
Part A: Double-Blind Treatment Period
Eligible participants will be randomly assigned in a double-blind manner and a 1:1 ratio to receive 1.0mg-1.5mg/kg relutrigine or placebo once daily orally or gastronomy/jejunostomy for 16 weeks
  • Drug: 1.0mg/kg/day PRAX-562
    Once daily orally or gastronomy/jejunostomy
    Other names:
    • relutrigine
  • Drug: 1.5mg/kg/day PRAX-562
    Once daily orally or gastronomy/jejunostomy
  • Drug: Placebo
    Once daily orally or gastronomy/jejunostomy
Placebo Comparator
Part A: Double-Blind Treatment Period (Placebo)
Eligible participants will be randomly assigned in a double-blind manner and a 1:1 ratio to receive 1.0mg-1.5mg/kg relutrigine or placebo once daily orally or gastronomy/jejunostomy for 16 weeks
  • Drug: Placebo
    Once daily orally or gastronomy/jejunostomy
Experimental
Part B: Open-Label Extension Treatment Period
Participants from Part A will have the option to rollover to Part B to receive 1.0mg-1.5mg/kg of relutrigine once daily orally or gastronomy/jejunostomy for 32 weeks
  • Drug: 1.0mg/kg/day PRAX-562
    Once daily orally or gastronomy/jejunostomy
    Other names:
    • relutrigine
  • Drug: 1.5mg/kg/day PRAX-562
    Once daily orally or gastronomy/jejunostomy

Recruiting Locations

Praxis Research Site
Chevy Chase, Maryland 20815

More Details

NCT ID
NCT07010471
Status
Recruiting
Sponsor
Praxis Precision Medicines

Study Contact

Head of Pharmacovigilance
617-300-8460
clinicaltrials@praxismedicines.com