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Dravet syndrome (also called severe myoclonic epilepsy of infancy) is defined in the MONDO ontology as a channelopathy with epilepsy that begins during the first year of life, typically at 4 to 5 months. The definition describes status epilepticus and a variety of drug-resistant seizures that are often induced by fever, in previously healthy children, and states that the condition frequently leads to cognitive and motor impairment. Prevalence figures are not certified in this packet.
The MONDO definition describes Dravet syndrome as a channelopathy and notes that it differs from other channelopathies in usually being due to a variant in one particular gene. No genes, OMIM entries, inheritance patterns or molecular mechanism are populated in this packet, so the specific genetic cause and mode of inheritance are not described here.
The packet does not certify diagnostic methods, criteria or newborn screening information for Dravet syndrome.
The packet lists three FDA-approved treatments for Dravet syndrome with an active market status: fenfluramine (Fintepla, approved 2020-06-25), stiripentol (Diacomit, approved 2018-08-20) and cannabidiol (Epidiolex, approved 2018-06-25). A separate cannabidiol orphan record is listed as withdrawn and is not a current option. The packet also lists many additional orphan drug designations for Dravet syndrome for other compounds. Designation is not approval, and these products are not described as approved. Supportive therapies and eligibility details are not certified in this packet.
28 trials found
The packet contains no natural-history data for Dravet syndrome. The MONDO definition states that the condition frequently leads to cognitive and motor impairment. Survival, long-term outcomes and variability are not certified in this packet.
The packet lists ClinicalTrials.gov records for Dravet syndrome, among them the following. The Encoded Therapeutics studies of ETX101, an AAV9-delivered gene therapy, in children with a gene-positive form of Dravet syndrome are NCT05419492 (Phase 1, recruiting) and NCT06283212 (Phase 1, active, not recruiting). Stoke Therapeutics sponsors a Phase 3 placebo-controlled study of zorevunersen (NCT06872125, recruiting). Longboard Pharmaceuticals sponsors a Phase 3 study of LP352 (NCT06660394, active, not recruiting), and Epygenix a Phase 3 study of clemizole hydrochloride (NCT04462770, recruiting). Listing of a trial does not indicate that an intervention is effective.
Data assembled from 4 of 12 sources · Last updated Nov 3, 2026, 5:29 AM UTC
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Genetic and Rare Diseases Info Center
AI-curated news mentioning Dravet syndrome
Updated Oct 24, 2026
early life prolonged hyperthermic seizures alter disease trajectory in the scn1a tm1kea mouse model of dravet syndrome
Zorevunersen has demonstrated the potential for disease modification and has been granted orphan drug designation by the FDA and the EMA. The FDA has also granted zorevunersen rare pediatric disease designation and Breakthrough Therapy Designation for the treatment of Dravet syndrome with a ... Zorevunersen has demonstrated the potential for disease modification and has been granted orphan drug designation by the FDA and the EMA. The FDA has also granted zorevunersen rare pediatric disease designation and Breakthrough Therapy Designation for the treatment of Dravet syndrome with a confirmed mutation not associated with gain-of-function in the SCN1A gene, and China’s Center for Drug Evaluation has granted zorevunersen Breakthrough Therapy Designation. Cumbo brings more than 30 years in biopharma. Zorevunersen is in Phase 3, and Stoke is preparing to deliver it following potential FDA approval in early 2028. Orphan drug designation is a special status given to medicines developed to treat rare diseases affecting only a small number of people. This status often provides benefits like faster approval processes and financial incentives, making it more attractive for companies to develop these drugs. For investors, it signals potential for exclusive market rights and reduced competition, which can impact the drug’s profitability. ... A breakthrough therapy designation is a regulatory fast-track given to a drug or treatment that shows early signs of providing a major improvement over existing options for a serious condition. Between 2013 and 2020, he held several commercial leadership positions of increasing responsibility at Sarepta Therapeutics, where he ultimately served as Chief Commercial Officer and was instrumental in bringing the first FDA-approved treatments for Duchenne muscular dystrophy to patients.
A preliminary report evaluates the efficacy of stiripentol and fenfluramine, both alone and in combination, on clinical outcomes in patients with Dravet syndrome. The findings contribute to understanding treatment options for this severe epilepsy disorder.
Zorevunersen has demonstrated the potential for disease modification and has been granted orphan drug designation by the FDA and the EMA. The FDA has also granted zorevunersen rare pediatric disease designation and Breakthrough Therapy Designation for the treatment of Dravet syndrome with a ... Zorevunersen has demonstrated the potential for disease modification and has been granted orphan drug designation by the FDA and the EMA. The FDA has also granted zorevunersen rare pediatric disease designation and Breakthrough Therapy Designation for the treatment of Dravet syndrome with a confirmed mutation not associated with gain-of-function in the SCN1A gene, and China’s Center for Drug Evaluation has granted zorevunersen Breakthrough Therapy Designation. CEO Ian F. Smith and Chief Patient Officer Jason Hoitt will present at 1 p.m. ET, with a live webcast and archived replay on Stoke's website. Orphan drug designation is a special status given to medicines developed to treat rare diseases affecting only a small number of people. This status often provides benefits like faster approval processes and financial incentives, making it more attractive for companies to develop these drugs. For investors, it signals potential for exclusive market rights and reduced competition, which can impact the drug’s profitability. ... A breakthrough therapy designation is a regulatory fast-track given to a drug or treatment that shows early signs of providing a major improvement over existing options for a serious condition. Source: Stoke Therapeutics, Inc. ... Antisense oligonucleotides are short, synthetic pieces of genetic material designed to stick to specific messenger RNA molecules inside cells and block or alter the production of a particular protein. For investors, they matter because they represent a targeted drug approach with potential to treat diseases that other medicines cannot, but they also carry development, safety and regulatory risks that can lead to large swings in a biotech company’s value.
Zorevunersen has demonstrated the potential for disease modification and has been granted orphan drug designation by the FDA and the EMA. The FDA has also granted zorevunersen rare pediatric disease designation and Breakthrough Therapy Designation for the treatment of Dravet syndrome with a ... Zorevunersen has demonstrated the potential for disease modification and has been granted orphan drug designation by the FDA and the EMA. The FDA has also granted zorevunersen rare pediatric disease designation and Breakthrough Therapy Designation for the treatment of Dravet syndrome with a confirmed mutation not associated with gain-of-function in the SCN1A gene, and China’s Center for Drug Evaluation has granted zorevunersen Breakthrough Therapy Designation. –4-year data from the Phase 1/2a open-label extension (OLE) studies support the potential disease-modifying effects of zorevunersen– –Improvements in... Biogen Safe Harbor This news release contains forward-looking statements, including, among others, relating to: the potential clinical effects of zorevunersen; the potential for zorevunersen to change the course of Dravet syndrome and improve outcomes for patients; the expected timing of Phase 3 study results; the potential benefits, safety and efficacy of zorevunersen; potential regulatory discussions, submissions and approvals and the timing thereof; the treatment of the underlying causes of Dravet syndrome; the anticipated benefits, risks and potential of Biogen's collaboration arrangements with Stoke Therapeutics; the potential of Biogen's commercial business and pipeline programs, including zorevunersen; and risks and uncertainties associated with drug development and commercialization. Based on Stoke Therapeutics’ preliminary estimates, which scaled annual incidence to prevalence using country-specific live birth rates over the past 85 years and adjusted for Dravet-specific mortality. The estimate is based on incidence rates published by Wu et al., Pediatrics, 2015. ... August 31, 2026 19:30 ET | Source: Biogen Inc. Canada’s Drug Agency Issues Final Positive Recommendation Supporting Public Reimbursement of LEQEMBI® (lecanemab) for Early Alzheimer’s Disease