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Showing 1–15 of 15 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Epilepsy, Primary Generalized Tonic-Clonic Seizures Clear all
Recruiting Phase 2 Interventional

An Open Label Trial to Evaluate the Efficacy and Safety of PRAX-628 in Adults With Focal Onset or Tonic-Clonic Seizures

NCT06908356
View directory record Official record
Conditions
Focal Onset Seizure, Primary Generalized Epilepsy
Interventions
30mg PRAX-628
Drug
Lead sponsor
Praxis Precision Medicines
Industry
Eligibility
18 Years to 75 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025
U.S. locations
8
States / cities
Phoenix, Arizona • Miami Lakes, Florida • Bethesda, Maryland + 5 more
Source: ClinicalTrials.gov public record
Updated Apr 2, 2025 · Synced Jun 9, 2026, 11:59 PM EDT
Completed Phase 3 Interventional Results available

A Safety, Efficacy and Tolerability Trial of Pregabalin as Add-On Treatment in Pediatric and Adult Subjects With Primary Generalized Tonic-Clonic (i.e., Grand Mal) Seizures.

NCT01747915
View directory record Official record
Conditions
Generalized Tonic Clonic Seizures
Interventions
Pregabalin Dose Level 1, Pregabalin Dose Level 2, Placebo
Drug
Lead sponsor
Pfizer's Upjohn has merged with Mylan to form Viatris Inc.
Industry
Eligibility
5 Years to 65 Years
Enrollment
219 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2019
U.S. locations
12
States / cities
Loxahatchee Groves, Florida • Orlando, Florida • Port Charlotte, Florida + 6 more
Source: ClinicalTrials.gov public record
Updated Jan 19, 2021 · Synced Jun 9, 2026, 11:59 PM EDT
Recruiting Phase 3 Interventional

A Study to Evaluate XEN1101 as Adjunctive Therapy in Primary Generalized Tonic-Clonic Seizures

NCT05667142
View directory record Official record
Conditions
Primary Generalized Tonic-Clonic Seizures
Interventions
XEN1101, Placebo
Drug
Lead sponsor
Xenon Pharmaceuticals Inc.
Industry
Eligibility
12 Years and older
Enrollment
160 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2027
U.S. locations
59
States / cities
Mobile, Alabama • Phoenix, Arizona • Tucson, Arizona + 50 more
Source: ClinicalTrials.gov public record
Updated Jun 2, 2026 · Synced Jun 9, 2026, 11:59 PM EDT
Completed Phase 3 Interventional Results available

A Study to Assess the Safety and Efficacy of Lacosamide Versus Placebo (a Pill Without Active Medication) in Patients With Idiopathic Generalised Epilepsy Who Are Already Taking Anti-epileptic Medications

NCT02408523
View directory record Official record
Conditions
Epilepsy
Interventions
Lacosamide Tablet, Lasosamide Oral Solution, Placebo Tablet, Placebo Oral Solution
Drug · Other
Lead sponsor
UCB BIOSCIENCES, Inc.
Industry
Eligibility
4 Years and older
Enrollment
242 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2019
U.S. locations
27
States / cities
Alabaster, Alabama • Little Rock, Arkansas • Irvine, California + 23 more
Source: ClinicalTrials.gov public record
Updated Dec 16, 2020 · Synced Jun 9, 2026, 11:59 PM EDT
Completed Phase 3 Interventional Results available

Perampanel as Adjunctive Therapy in Pediatrics With Partial Onset Seizures or Primary Generalized Tonic Clonic Seizures

NCT02849626
View directory record Official record
Conditions
Partial-Onset or Primary Generalized Tonic-Clonic Seizures
Interventions
Perampanel
Drug
Lead sponsor
Eisai Inc.
Industry
Eligibility
4 Years to 12 Years
Enrollment
180 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2021
U.S. locations
29
States / cities
Little Rock, Arkansas • Palo Alto, California • Aurora, Colorado + 25 more
Source: ClinicalTrials.gov public record
Updated Oct 27, 2022 · Synced Jun 9, 2026, 11:59 PM EDT
Completed Phase 3 Interventional Results available

A 12-Month Study To Evaluate The Safety And Tolerability Of Pregabalin As Add-On Therapy In Pediatric Subjects 1 Month To 16 Years Of Age With Partial Onset Seizures And Pediatric And Adult Subjects 5 To 65 Years Of Age With Primary Generalized Tonic-Clonic Seizures

NCT01463306
View directory record Official record
Conditions
Epilepsy, Partial Seizures, Epilepsy, Primary Generalized Tonic-Clonic Seizures
Interventions
Pregabalin
Drug
Lead sponsor
Pfizer's Upjohn has merged with Mylan to form Viatris Inc.
Industry
Eligibility
1 Month to 66 Years
Enrollment
605 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2019
U.S. locations
21
States / cities
Tucson, Arizona • Little Rock, Arkansas • Los Angeles, California + 16 more
Source: ClinicalTrials.gov public record
Updated Jan 19, 2021 · Synced Jun 9, 2026, 11:59 PM EDT
Completed Phase 4 Interventional

Treatment Of Primary Generalized Tonic-Clonic Seizures With An Investigational New Drug

NCT00043901
View directory record Official record
Conditions
Epilepsy, Tonic-Clonic
Interventions
lamotrigine
Drug
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
2 Years and older
Enrollment
141 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2000 – 2005
U.S. locations
80
States / cities
Alabaster, Alabama • Mobile, Alabama • Northport, Alabama + 71 more
Source: ClinicalTrials.gov public record
Updated Apr 3, 2017 · Synced Jun 9, 2026, 11:59 PM EDT
Completed Phase 3 Interventional Results available

Safety and Efficacy of Lacosamide as Additional Therapy in Patients Suffering From Epileptic Tonic-Clonic Seizures

NCT02408549
View directory record Official record
Conditions
Epilepsy
Interventions
Lacosamide Tablet, Lacosamide Oral Solution
Drug
Lead sponsor
UCB BIOSCIENCES, Inc.
Industry
Eligibility
4 Years and older
Enrollment
239 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2023
U.S. locations
16
States / cities
Little Rock, Arkansas • Santa Monica, California • Colorado Springs, Colorado + 13 more
Source: ClinicalTrials.gov public record
Updated Dec 13, 2023 · Synced Jun 9, 2026, 11:59 PM EDT
Completed Phase 3 Interventional Results available

Study Evaluating LAMICTAL Extended-Release Therapy Added To Current Seizure Treatments In Patients With Primary Generalized Tonic-Clonic Seizures (PGTC) Seizures

NCT00104416
View directory record Official record
Conditions
Epilepsy, Tonic-Clonic
Interventions
lamotrigine (LAMICTAL) extended-release, Placebo
Drug
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
13 Years and older
Enrollment
153 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2008
U.S. locations
64
States / cities
Anniston, Alabama • Birmingham, Alabama • Northport, Alabama + 56 more
Source: ClinicalTrials.gov public record
Updated Jan 1, 2017 · Synced Jun 9, 2026, 11:59 PM EDT
Enrolling by invitation Phase 3 Interventional

Clinical Trial of Vormatrigine in Adult Patients With Epilepsy

NCT07287163
View directory record Official record
Conditions
Epilepsy, Tonic-Clonic, Focal Seizure, Primary Generalized Seizure
Interventions
vormatrogine
Drug
Lead sponsor
Praxis Precision Medicines
Industry
Eligibility
18 Years to 85 Years
Enrollment
700 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
9
States / cities
Miami Lakes, Florida • Naples, Florida • Lafayette, Louisiana + 6 more
Source: ClinicalTrials.gov public record
Updated Dec 16, 2025 · Synced Jun 9, 2026, 11:59 PM EDT
Enrolling by invitation Phase 3 Interventional

Cenobamate Open-Label Extension Study for YKP3089C025

NCT03961568
View directory record Official record
Conditions
Primary Generalized Tonic Clonic Seizures in the Setting of Idiopathic Generalized Epilepsy
Interventions
Cenobamate
Drug
Lead sponsor
SK Life Science, Inc.
Industry
Eligibility
12 Years and older
Enrollment
145 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2026
U.S. locations
16
States / cities
La Jolla, California • Miami, Florida • Tampa, Florida + 13 more
Source: ClinicalTrials.gov public record
Updated Jan 6, 2026 · Synced Jun 9, 2026, 11:59 PM EDT
Completed Not applicable Interventional

RNS System NAUTILUS Study

NCT05147571
View directory record Official record
Conditions
Epilepsy, Idiopathic Generalized Epilepsy, Generalized Tonic Clonic Seizure
Interventions
Responsive stimulation, Sham stimulation
Device
Lead sponsor
NeuroPace
Industry
Eligibility
12 Years and older
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
23
States / cities
Birmingham, Alabama • Phoenix, Arizona • Aurora, Colorado + 18 more
Source: ClinicalTrials.gov public record
Updated Jun 7, 2026 · Synced Jun 9, 2026, 11:59 PM EDT
Completed Phase 3 Interventional

Randomized, Double-Blind Study to Evaluate Efficacy and Safety of Cenobamate Adjunctive Therapy in PGTC Seizures

NCT03678753
View directory record Official record
Conditions
Primary Generalized Epilepsy
Interventions
Cenobamate, Placebo
Drug
Lead sponsor
SK Life Science, Inc.
Industry
Eligibility
12 Years and older
Enrollment
169 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2025
U.S. locations
43
States / cities
Phoenix, Arizona • Tucson, Arizona • Fresno, California + 37 more
Source: ClinicalTrials.gov public record
Updated Jul 8, 2025 · Synced Jun 9, 2026, 11:59 PM EDT
Completed Phase 2 Interventional Results available

Open-Label Extension Study to Assess the Safety and Seizure Frequency Associated With Lacosamide for Primary Generalized Tonic-Clonic Seizures in Subjects With Epilepsy

NCT01118962
View directory record Official record
Conditions
Epilepsy
Interventions
Lacosamide
Drug
Lead sponsor
UCB BIOSCIENCES, Inc.
Industry
Eligibility
16 Years to 65 Years
Enrollment
39 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
19
States / cities
Phoenix, Arizona • Little Rock, Arkansas • Aurora, Colorado + 16 more
Source: ClinicalTrials.gov public record
Updated Jul 16, 2018 · Synced Jun 9, 2026, 11:59 PM EDT
Completed Phase 2 Interventional Results available

Open-Label Study to Assess Lacosamide Safety as Add-on Therapy for Primary Generalized Tonic-Clonic Seizures in Subjects With Epilepsy

NCT01118949
View directory record Official record
Conditions
Epilepsy
Interventions
Lacosamide
Drug
Lead sponsor
UCB BIOSCIENCES, Inc.
Industry
Eligibility
16 Years to 65 Years
Enrollment
49 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
25
States / cities
Alabaster, Alabama • Phoenix, Arizona • Little Rock, Arkansas + 22 more
Source: ClinicalTrials.gov public record
Updated Jul 16, 2018 · Synced Jun 9, 2026, 11:59 PM EDT