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A Phase 3, Placebo-Controlled Study to Investigate LP352 in Children and Adults With Dravet Syndrome (DS)

RecruitingPhase 3

Sponsor: Longboard Pharmaceuticals

Conditions: Dravet Syndrome

Interventions: LP352, Placebo

Countries: United States, Australia, Belgium, Brazil, Canada, China, Denmark, Finland

This (DEEp SEA Study) is a double-blind, randomized, placebo-controlled, multicenter study to investigate the efficacy, safety, and tolerability of LP352 in the treatment of seizures in children and adults with DS. The study consists of 3 main phases: Screening, Titration period, and Maintenance period, followed by a Taper period and Follow-Up. Participants will be randomized to LP352 or placebo. The total duration of the study will be approximately 24 months.

Eligibility overview

Sex: ALL

Age: 2 Years to 65 Years

Healthy volunteers: No

Study type: INTERVENTIONAL

Eligibility criteria

Inclusion Criteria:

* Diagnosis of DS must fulfill all of the following criteria:

1. Participants with seizure onset age \>1 and \<20 months
2. The participant has a history of at least 1 of the following seizure type(s): prolonged generalized tonic-clonic, hemiclonic, myoclonic, tonic, atonic, atypical absence, focal impaired awareness, nonconvulsive status epilepticus
* The participant has a current occurrence of at least 1 of the following countable motor seizure types: generalized tonic-clonic, tonic (bilateral), clonic (bilateral), atonic (bilateral) with truncal/leg involvement, focal motor (including hemiclonic), and focal to bilateral tonic-clonic
* The participant has demonstrated an average of at least 4 countable motor seizures per month for the 3 months prior to Screening.
* The participant has been taking 1 to 4 antiseizure medications (ASMs) at a stable dose for at least 4 weeks prior to Screening.
* The participant, parent, or caregiver is willing and able (in the judgment of the investigator) to comply with completion of the diaries throughout the study.
* The participant must be willing and able to provide written informed consent.

Exclusion Criteria:

* The participant has a history of infantile/epileptic spasms.
* The participant has been admitted to a medical facility for treatment of status epilepticus requiring mechanical ventilation within 3 months prior to Screening.
* The participant has a neurodegenerative disorder as indicated by magnetic resonance imaging or genetic testing.
* The participant has an acquired lesion/injury unrelated to the primary etiology that could contribute as a secondary cause of seizures.
* The participant is receiving exclusionary medications.
* The participant is currently using any cannabis product or cannabidiol that is not in oral solution/capsule/tablet form, not obtained from a government-approved dispensary, or contains ≥50% Delta-9-tetrahydrocannabinol (THC).
* The participant has unstable, clinically significant neurologic (other than the disease being studied, eg, recurrent strokes), psychiatric, cardiovascular (eg, pulmonary arterial hypertension, cardiac valvulopathy, orthostatic hypotension/tachycardia), pulmonary, hepatic, renal, metabolic, gastrointestinal, urologic, immunologic, hematopoietic, or endocrine disease or other abnormality which may impact the ability of the participant to participate or potentially confound the study results.
* The participant is unwilling to comply with any of the study requirements or timelines.

Locations (104)

Little Rock, Arkansas, United States
Los Angeles, California, United States
Los Angeles, California, United States
Palo Alto, California, United States
San Francisco, California, United States
Aurora, Colorado, United States
Washington D.C., District of Columbia, United States
Gulf Breeze, Florida, United States
Miami, Florida, United States
Orlando, Florida, United States
Tampa, Florida, United States
Atlanta, Georgia, United States
Chicago, Illinois, United States
Chicago, Illinois, United States
Bethesda, Maryland, United States
Rochester, Minnesota, United States
Livingston, New Jersey, United States
Morristown, New Jersey, United States
New York, New York, United States
Portland, Oregon, United States
Memphis, Tennessee, United States
Austin, Texas, United States
Fort Worth, Texas, United States
Houston, Texas, United States
Tacoma, Washington, United States
Randwick, New South Wales, Australia
Randwick, New South Wales, Australia
Westmead, New South Wales, Australia
Herston, Queensland, Australia
South Brisbane, Queensland, Australia
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