Medical Information Only. Consult your healthcare provider before considering clinical trial enrollment.
Developmental and Epileptic Encephalopathy: early-phase trial registry
1 of 4 indexed Developmental and Epileptic Encephalopathy trials are currently recruiting, with more weight in Phase 1-2.
Corpus placement: #4,115 of 28,707 conditions by registered trial count.
4 US clinical trials · 1 currently recruiting · #4,115 of 28,707 conditions by registered trial count
Developmental and Epileptic Encephalopathy: 4 US clinical trials tracked, 1 recruiting.
Developmental and Epileptic Encephalopathy is the subject of 4 registered US clinical trials on ClinicalTrials.gov, 1 of them currently open to new participants. 1 are in Phase 3-4 (later-stage) and 3 in Phase 1-2 (earlier-stage). The most active sponsor is Longboard Pharmaceuticals, running 3 of these trials.
Enrollment posture brief
Registry condition developmental-and-epileptic-encephalopathy
OPEN 1 | RECR 25% | LATE 1 | EARLY 3 | RANK #4115 | SPON 3
Volume-matched condition peers
Nearest open-share peer: Abdominal Cancer (25% recruiting · 8 trials)
Developmental and Epileptic Encephalopathy lists 1 open slots (25% of 4 indexed trials). Peers are matched on registered volume, not therapeutic-area browse lists. How peer matching works →
Key findings
What ClinicalTrials.gov does not surface for Developmental and Epileptic Encephalopathy on its own pages , computed from the registry mirror as of 2026-08-08. Each line carries its own denominator so it can be quoted as it stands.
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Developmental and Epileptic Encephalopathy is recruiting below its size-band peers.
1 of 4 indexed trials (25%) are open to enrollment, against a 46.5% average across 27,806 conditions with fewer than 20 trials. The peer set uses the same ClinicalTrials.gov-derived counts as this page.
Open and recent trials
4 total, page 1 of 1
A Study to Investigate LP352 in Children and Adults With Developmental and Epileptic Encephalopathies (DEE)
Longboard Pharmaceuticals
NCT06719141
Phenylbutyrate for Monogenetic Developmental and Epileptic Encephalopathy
Weill Medical College of Cornell University
NCT04937062
Study to Investigate LP352 in Subjects With Developmental and Epileptic Encephalopathies
Longboard Pharmaceuticals
NCT05364021
Open-label, Long-term Safety Study of LP352 in Subjects With Developmental and Epileptic Encephalopathy
Longboard Pharmaceuticals
NCT05626634
Phase Distribution
| Phase | Trial count |
|---|---|
| Phase 1 | 2 |
| Phase 2 | 1 |
| Phase 3 | 1 |
Top Sponsors
Named interventions
Most-linked intervention names on Developmental and Epileptic Encephalopathy records (sponsor-reported on ClinicalTrials.gov). Counts are trial links, not unique products.
US sites by state
Facility locations filed on Developmental and Epileptic Encephalopathy trials. A trial with sites in several states counts in each.
Source: ClinicalTrials.gov, National Library of Medicine. Data is informational only.
Related
What to do with this Developmental and Epileptic Encephalopathy page
4 registered trials, 1 currently recruiting, is a starting point for a conversation, not a diagnosis or a recommendation.
- 1 Developmental and Epileptic Encephalopathy trials are currently recruiting, check eligibility criteria before contacting a site. Browse recruiting trials
- Longboard Pharmaceuticals sponsors the most Developmental and Epileptic Encephalopathy trials on record, review their full trial history before evaluating a specific study. See Longboard Pharmaceuticals's trials
- Bring the specific trial ID (NCT number) to your own doctor before enrolling, this page is a directory, not medical guidance. Read the trial-finding guide
Trial and recruiting counts reflect ClinicalTrials.gov registry status as of the data vintage above; individual trial eligibility and enrollment status can change.
Every figure on PlainTrial is rendered directly from the ClinicalTrials.gov registry, no number is typed in by an editor. This Developmental and Epileptic Encephalopathy condition card totals 4 registered trials; most-linked intervention LP352; top US site state New York. See our editorial standards & corrections policy, the methodology behind these numbers, the data changelog, or report a data error.