Skip to content

Efficacy and Safety of Diazepam in the Management of Refractory Epilepsy in Selected Patients Who Require Intermittent Medical Intervention for Acute Repetitive Seizures.

A Phase 3, Randomized, Double-blind, Parallel, Placebo-controlled, Multicenter Study, With Optional Open-label Continuation, Of The Efficacy And Safety Of Vanquix(tm) Auto-injector (Diazepam Injection) For The Management Of Selected, Refractory, Patients With Epilepsy Who Require Intermittent Medical Intervention To Control Episodes Of Acute Repetitive Seizures

Status
Completed
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT00319501
Enrollment
234
Registered
2006-04-27
Start date
2006-01-31
Completion date
2014-07-31
Last updated
2016-09-23

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Epilepsies, Partial, Epilepsy, Epilepsy, Complex Partial, Epilepsy, Generalized, Seizures

Keywords

Acute Repetitive Seizures, ARS, Diazepam, Cluster Seizures

Brief summary

To evaluate the efficacy and safety of diazepam in the management of refractory epilepsy in selected patients who require intermittent medical intervention for the control of episodes of acute repetitive seizures. In addition, to assess the support provided by caregivers who are not themselves or not under the direct supervision of health care professionals at the time of administration.

Interventions

DRUGPlacebo

Intramuscular autoinjector; administered at onset of an episode

DRUGVanquix Auto-Injector (Diazepam Injection)

Intramuscular autoinjector: 5, 10, 15, or 20 mg (based on participant's age and weight); administered at the onset of an episode

Sponsors

Pfizer
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
QUADRUPLE (Subject, Caregiver, Investigator, Outcomes Assessor)

Eligibility

Sex/Gender
ALL
Age
2 Years to No maximum
Healthy volunteers
No

Inclusion criteria

Key Inclusion Criteria For Patient: * Older than 2 years of age and between 6 and 136 kg body weight * Recipient of clinical diagnosis of epilepsy, taking a stable antiepileptic drug regimen for at least 2 weeks, and requiring intermittent medical intervention to control episodes of acute repetitive seizures (ARS) * Experienced at least 2 episodes of ARS in previous year, one of which occurred in previous 6 months * Has episodes of ARS that include complex partial or generalized seizures * Has a responsible caregiver available to participate * Is not pregnant or lactating and is practicing an acceptable method of birth control. For Caregiver: * Age of 18 years or older and has demonstrated responsibility as a caregiver through training to: * Recognize an episode of repetitive seizures for which the injection was intended, * Administer study drug * Count and record seizures and respiratory rate in the patient diary, * Monitor the patient and record observations in the patient diary for 12 hours following study drug treatment * Recognize the need for immediate medical attention. Key

Exclusion criteria

For Patient: * Petit mal status or petit mal variant status * History of ARS consistently progressing to status epilepticus * History of failure to respond to benzodiazepine treatment * Hypersensitivity to diazepam * Acute narrow angle glaucoma * Alcohol and/or other substance abuse * Has taken another investigational drug in previous 30 days * Acute or progressive neurologic or severe psychiatric disease or severe mental abnormality.

Design outcomes

Primary

MeasureTime frameDescription
Time to Next Seizure or Rescue Medication During the Double-blind Period (Kaplan-Meier 50th Percentile)From 15 minutes to 12 hours after study drug administration for an episode of ARS during the Double-blind PeriodAn event was defined as an episode of or required rescue medication for an episode of acute repetitive seizures (ARS) within 15 minutes to 12 hours following study drug administration. Patients without an ARS event were censored at 12 hours. Diaries were provided; if no diary was returned, or the diary did not provide answers to questions about seizures and rescue during the 12-hour follow-up period, the patient was considered censored as of 15 minutes past the treatment time, unless another contact was documented. If seizure control following study drug administration was inadequate, diazepam rectal gel was provided as a rescue medication, given only in the first 4 hours after study drug administration and only if the caregiver was directed to do so by the Investigator or designee at the time of the ARS episode. Patients and their caregivers were trained to recognize the onset of an episode of ARS and when and how to administer study drug.
Percentage of Participants With an Event (Next Seizure or Rescue Medication) During the Open-label PeriodFrom 15 minutes to 12 hours after study drug administration for an episode of ARS during the Double-blind PeriodAn event was defined as an episode of or required rescue medication for an episode of acute repetitive seizures (ARS) within 15 minutes to 12 hours following study drug administration. Patients without an ARS event were censored at 12 hours. Diaries were provided; if no diary was returned, or the diary did not provide answers to questions about seizures and rescue during the 12-hour follow-up period, the patient was considered censored as of 15 minutes past the treatment time, unless another contact was documented. If seizure control following study drug administration was inadequate, diazepam rectal gel was provided as a rescue medication, given only in the first 4 hours after study drug administration and only if the caregiver was directed to do so by the Investigator or designee at the time of the ARS episode. Patients and their caregivers were trained to recognize the onset of an episode of ARS and when and how to administer study drug.

Secondary

MeasureTime frameDescription
Number of Participants Requiring Rescue Medical Care Other Than Rescue Medication or Emergency Department Visits During the Double-blind PeriodFrom 15 minutes to 12 hours following study drug administration for an episode of ARS during the Double-blind PeriodOther rescue medical care consisted of care other than rescue medication or emergency department visits. Each patient's specific criteria for seizure and an episode of acute repetitive seizure (ARS) were determined by the Investigator. Patients and their caregivers were trained to use these criteria to recognize the onset of an episode of ARS and when and how to administer study drug. An episode of ARS was defined as an episode of multiple complex, partial, or generalized seizures occurring over a brief period (minutes to 12 hours) with the patient regaining consciousness between seizures, which were readily recognizable by the patient or a trained caregiver. ARS includes seizures sometimes referred to as serial, cluster, crescendo, or stuttering prolonged.
Mean Score on Caregiver Global Treatment Assessment During the Double-blind PeriodAssessments completed at the end of each treated episode of ARS in the Double-blind PeriodCaregiver global evaluation is based on seizure frequency, severity, and overall outcome compared with previous episodes and is rated on a 10-cm visual analogue scale, where 0=much worse and 10=much better. A higher score indicates greater improvement. An episode of acute repetitive seizures (ARS) is defined as an episode of multiple complex, partial, or generalized seizures occurring over a brief period (minutes to 12 hours) with the patient regaining consciousness between seizures, which were readily recognizable by the patient or a trained caregiver. ARS includes seizures sometimes referred to as serial, cluster, crescendo, or stuttering prolonged.
Mean Score on Physician Global Treatment Assessment During the Double-blind PeriodAt Visit 2 and subsequent visits in the Double-blind PeriodPhysician global evaluation is based on seizure frequency, severity, and overall outcome compared with previous episodes. The physician global evaluation is rated on a 10-cm visual analogue scale, where 0=much worse and 10=much better. A higher score indicates greater improvement. An episode of acute repetitive seizures (ARS) was defined as an episode of multiple complex, partial, or generalized seizures occurring over a brief period (minutes to 12 hours) with the patient regaining consciousness between seizures, which were readily recognizable by the patient or a trained caregiver. ARS includes seizures sometimes referred to as serial, cluster, crescendo, or stuttering prolonged.
Number of Participants Requiring Rescue Medication During the Open-label PeriodFrom 15 minutes to 12 hours after study drug administration during the Open-label PeriodEach patient's specific criteria for seizure and an episode of acute repetitive seizure (ARS) were determined by the Investigator. Patients and their caregivers were trained to use these criteria to recognize the onset of an episode of ARS and when and how to administer study drug. If seizure control following study drug administration was inadequate, diazepam rectal gel was provided as a rescue medication, given only in the first 4 hours after study drug administration and only if the caregiver was directed to do so by the Investigator or designee at the time of the ARS episode.
Number of Participants Requiring Rescue Medication During the Double-blind PeriodFrom 15 minutes to 12 hours following study drug administration for an episode of ARS during the Double-blind PeriodIf seizure control following study drug administration was inadequate, diazepam rectal gel was provided as a rescue medication, given only in the first 4 hours after study drug administration and only if the caregiver was directed to do so by the Investigator or designee at the time of the acute repetitive seizure (ARS) episode. Each patient's specific criteria for seizure and an episode of ARS were determined by the Investigator. Patients and their caregivers were trained to use these criteria to recognize the onset of an episode of ARS and when and how to administer study drug. An episode of ARS was defined as an episode of multiple complex, partial, or generalized seizures occurring over a brief period (minutes to 12 hours) with the patient regaining consciousness between seizures, which were readily recognizable by the patient or a trained caregiver. ARS includes seizures sometimes referred to as serial, cluster, crescendo, or stuttering prolonged.
Number of Participants Requiring Rescue Medical Care Other Than Medication or Emergency Department Visits During the Open-label PeriodFrom 15 minutes to 12 hours after study drug administration for onset of an episode of ARS during the Open-label PeriodOther rescue medical care consisted of care other than rescue medication or emergency department visits. Each patient's specific criteria for seizure and an episode of acute repetitive seizure (ARS) were determined by the Investigator. Patients and their caregivers were trained to use these criteria to recognize the onset of an episode of ARS and when and how to administer study drug.
Mean Score on Caregiver Global Treatment Assessment During the Open-label PeriodAssessments completed at the end of each treated episode of ARS in the Open-label PeriodCaregiver global evaluation is based on seizure frequency, severity, and overall outcome compared with previous episodes and is rated on a 10-cm visual analogue scale, where 0=much worse and 10=much better. A higher score indicates greater improvement. An episode of acute repetitive seizures (ARS) is defined as an episode of multiple complex, partial, or generalized seizures occurring over a brief period (minutes to 12 hours) with the patient regaining consciousness between seizures, which were readily recognizable by the patient or a trained caregiver. ARS includes seizures sometimes referred to as serial, cluster, crescendo, or stuttering prolonged.
Mean Score on Physician Global Treatment Assessment During the Open-label PeriodFrom Visit 2 and subsequent visits in the Open-label Period to discharge or study terminationPhysician global evaluation is based on seizure frequency, severity, and overall outcome compared with previous episodes and is rated on a 10-cm visual analogue scale, where 0=much worse and 10=much better. A higher score indicates greater improvement. An episode of acute repetitive seizures (ARS) is defined as an episode of multiple complex, partial, or generalized seizures occurring over a brief period (minutes to 12 hours) with the patient regaining consciousness between seizures, which were readily recognizable by the patient or a trained caregiver. ARS includes seizures sometimes referred to as serial, cluster, crescendo, or stuttering prolonged.
Number of Participants Requiring Emergency Department Visits During the Open-label PeriodFrom 15 minutes to 12 hours after study drug administration for onset of an episode of ARS during the Open-label PeriodAny use of emergency treatment (such as an emergency room visit) was recorded in the patient's diary, along with the date, time, and reason for the emergency treatment. Emergency department visits required some type of rescue action taken, other than the visit itself.
Number of Participants Requiring Emergency Department Visits During the Double-blind PeriodFrom 15 minutes to 12 hours following study drug administration for onset of an episode of ARS during the Double-blind PeriodAny use of emergency treatment (such as an emergency room visit) was recorded in the patient's diary, along with the date, time, and reason for the emergency treatment. Emergency department visits required some type of rescue action taken, other than the visit itself. An episode of acute repetitive seizures (ARS) was defined as an episode of multiple complex, partial, or generalized seizures occurring over a brief period (minutes to 12 hours) with the patient regaining consciousness between seizures, which were readily recognizable by the patient or a trained caregiver. ARS includes seizures sometimes referred to as serial, cluster, crescendo, or stuttering prolonged.

Countries

United States

Participant flow

Pre-assignment details

Of 234 participants randomized, 71 (29 placebo, 42 diazepam) did not receive/attempt to receive treatment. Discontinuation prior to treatment due to: 3,0 protocol violations; 6,5 sponsor's request; 4,8 Principal Investigator request; 5,11 other; 0,2 lost to follow-up, and 9,10 withdrawn consent.

Participants by arm

ArmCount
Diazepam
During the Double-blind Period, participants received a single, age- and weight-appropriate dose of diazepam solution, ranging from 0.2 to 0.5 mg/kg, administered by caregivers untrained as and unsupervised by healthcare professionals. Drug was delivered by a spring-driven, pressure-activated, prefilled autoinjector at the onset of an episode of acute repetitive seizures (ARS). Additional doses were permissible as needed during the Open-label and Open-label Extension Periods.
124
Placebo
During the Double-blind Period, participants received a single, age- and weight-appropriate dose of placebo solution as a deep intramuscular injection in the mid to outer thigh. Drug was administered by a caregiver using a spring-driven, pressure-activated, prefilled autoinjector at the onset of an episode of ARS.
110
Total234

Withdrawals & dropouts

PeriodReasonFG000FG001
Double-blind PeriodDid not receive treatment4229
Double-blind PeriodSponsor Request10
Double-blind PeriodWithdrawal by Subject03
Open-label Extension PeriodAdverse Event20
Open-label Extension PeriodDid not receive treatment180
Open-label Extension PeriodOther10
Open-label Extension PeriodPrincipal investigator decision20
Open-label Extension PeriodSponsor request260
Open-label Extension PeriodWithdrawal by Subject20
Open-label PeriodAdverse Event50
Open-label PeriodDid not receive treatment330
Open-label PeriodLost to Follow-up50
Open-label PeriodOther110
Open-label PeriodPrincipal Investigator decision60
Open-label PeriodProtocol Violation60
Open-label PeriodSponsor request120
Open-label PeriodWithdrawal by Subject380

Baseline characteristics

CharacteristicDiazepamTotalPlacebo
Age, Continuous22.8 years
STANDARD_DEVIATION 15.98
22.1 years
STANDARD_DEVIATION 14.61
21.3 years
STANDARD_DEVIATION 12.92
Age, Customized
12 years and older
94 participants184 participants90 participants
Age, Customized
2 to 5 years
12 participants18 participants6 participants
Age, Customized
6 to 11 years
18 participants32 participants14 participants
Ethnicity (NIH/OMB)
Hispanic or Latino
15 Participants24 Participants9 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
109 Participants210 Participants101 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
0 Participants0 Participants0 Participants
Height154.2 Centimeters
STANDARD_DEVIATION 25.08
154.4 Centimeters
STANDARD_DEVIATION 23.91
154.5 Centimeters
STANDARD_DEVIATION 22.61
Place of Residence
Foster home
0 Participants1 Participants1 Participants
Place of Residence
Group home
1 Participants2 Participants1 Participants
Place of Residence
Home
123 Participants230 Participants107 Participants
Place of Residence
Other
0 Participants0 Participants0 Participants
Place of Residence
Residential facility
0 Participants1 Participants1 Participants
Race/Ethnicity, Customized
American Indian or Alaska Native
0 Participants0 Participants0 Participants
Race/Ethnicity, Customized
Asian
2 Participants4 Participants2 Participants
Race/Ethnicity, Customized
Black/African American
13 Participants30 Participants17 Participants
Race/Ethnicity, Customized
Missing
0 Participants0 Participants0 Participants
Race/Ethnicity, Customized
Native Hawaiian or other Pacific Islander
0 Participants0 Participants0 Participants
Race/Ethnicity, Customized
Other
5 Participants7 Participants2 Participants
Race/Ethnicity, Customized
White/Caucasian
104 Participants193 Participants89 Participants
Sex: Female, Male
Female
62 Participants116 Participants54 Participants
Sex: Female, Male
Male
62 Participants118 Participants56 Participants
Weight61.0 Kilograms
STANDARD_DEVIATION 29.15
60.0 Kilograms
STANDARD_DEVIATION 28.79
58.9 Kilograms
STANDARD_DEVIATION 28.47

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
EG003
affected / at risk
deaths
Total, all-cause mortality
— / —— / —— / —— / —
other
Total, other adverse events
33 / 8143 / 12820 / 3332 / 79
serious
Total, serious adverse events
2 / 8120 / 12811 / 333 / 79

Outcome results

Primary

Percentage of Participants With an Event (Next Seizure or Rescue Medication) During the Open-label Period

An event was defined as an episode of or required rescue medication for an episode of acute repetitive seizures (ARS) within 15 minutes to 12 hours following study drug administration. Patients without an ARS event were censored at 12 hours. Diaries were provided; if no diary was returned, or the diary did not provide answers to questions about seizures and rescue during the 12-hour follow-up period, the patient was considered censored as of 15 minutes past the treatment time, unless another contact was documented. If seizure control following study drug administration was inadequate, diazepam rectal gel was provided as a rescue medication, given only in the first 4 hours after study drug administration and only if the caregiver was directed to do so by the Investigator or designee at the time of the ARS episode. Patients and their caregivers were trained to recognize the onset of an episode of ARS and when and how to administer study drug.

Time frame: From 15 minutes to 12 hours after study drug administration for an episode of ARS during the Double-blind Period

Population: All randomized participants for whom an attempt (successful or not) was made to administer study drug for an ARS event during the Open-label Period.

ArmMeasureValue (NUMBER)
DiazepamPercentage of Participants With an Event (Next Seizure or Rescue Medication) During the Open-label Period22.4 Percentage of participants
Primary

Time to Next Seizure or Rescue Medication During the Double-blind Period (Kaplan-Meier 50th Percentile)

An event was defined as an episode of or required rescue medication for an episode of acute repetitive seizures (ARS) within 15 minutes to 12 hours following study drug administration. Patients without an ARS event were censored at 12 hours. Diaries were provided; if no diary was returned, or the diary did not provide answers to questions about seizures and rescue during the 12-hour follow-up period, the patient was considered censored as of 15 minutes past the treatment time, unless another contact was documented. If seizure control following study drug administration was inadequate, diazepam rectal gel was provided as a rescue medication, given only in the first 4 hours after study drug administration and only if the caregiver was directed to do so by the Investigator or designee at the time of the ARS episode. Patients and their caregivers were trained to recognize the onset of an episode of ARS and when and how to administer study drug.

Time frame: From 15 minutes to 12 hours after study drug administration for an episode of ARS during the Double-blind Period

Population: All randomized participants for whom an attempt (successful or not) was made to administer study drug for an ARS event during the Double-blind Period.

ArmMeasureValue (MEDIAN)
DiazepamTime to Next Seizure or Rescue Medication During the Double-blind Period (Kaplan-Meier 50th Percentile)5.92 Hours
PlaceboTime to Next Seizure or Rescue Medication During the Double-blind Period (Kaplan-Meier 50th Percentile)NA Hours
Comparison: Null hypothesisp-value: 0.01295% CI: [0.34, 0.88]Cox Proportional Hazard
Secondary

Mean Score on Caregiver Global Treatment Assessment During the Double-blind Period

Caregiver global evaluation is based on seizure frequency, severity, and overall outcome compared with previous episodes and is rated on a 10-cm visual analogue scale, where 0=much worse and 10=much better. A higher score indicates greater improvement. An episode of acute repetitive seizures (ARS) is defined as an episode of multiple complex, partial, or generalized seizures occurring over a brief period (minutes to 12 hours) with the patient regaining consciousness between seizures, which were readily recognizable by the patient or a trained caregiver. ARS includes seizures sometimes referred to as serial, cluster, crescendo, or stuttering prolonged.

Time frame: Assessments completed at the end of each treated episode of ARS in the Double-blind Period

Population: All randomized participants for whom an attempt (successful or not) was made to administer study drug for an episode of ARS during the Double-blind Period.

ArmMeasureValue (MEAN)Dispersion
DiazepamMean Score on Caregiver Global Treatment Assessment During the Double-blind Period6.2 Units on a scaleStandard Deviation 2.79
PlaceboMean Score on Caregiver Global Treatment Assessment During the Double-blind Period5.5 Units on a scaleStandard Deviation 2.86
p-value: 0.08695% CI: [-0.11, 1.61]ANOVA
Secondary

Mean Score on Caregiver Global Treatment Assessment During the Open-label Period

Caregiver global evaluation is based on seizure frequency, severity, and overall outcome compared with previous episodes and is rated on a 10-cm visual analogue scale, where 0=much worse and 10=much better. A higher score indicates greater improvement. An episode of acute repetitive seizures (ARS) is defined as an episode of multiple complex, partial, or generalized seizures occurring over a brief period (minutes to 12 hours) with the patient regaining consciousness between seizures, which were readily recognizable by the patient or a trained caregiver. ARS includes seizures sometimes referred to as serial, cluster, crescendo, or stuttering prolonged.

Time frame: Assessments completed at the end of each treated episode of ARS in the Open-label Period

Population: All randomized participants for whom an attempt (successful or not) was made to administer study drug for an ARS event during the Open-label Period and who were available for participation.

ArmMeasureValue (MEAN)Dispersion
DiazepamMean Score on Caregiver Global Treatment Assessment During the Open-label Period6.78 Units on a scaleStandard Deviation 1.896
Secondary

Mean Score on Physician Global Treatment Assessment During the Double-blind Period

Physician global evaluation is based on seizure frequency, severity, and overall outcome compared with previous episodes. The physician global evaluation is rated on a 10-cm visual analogue scale, where 0=much worse and 10=much better. A higher score indicates greater improvement. An episode of acute repetitive seizures (ARS) was defined as an episode of multiple complex, partial, or generalized seizures occurring over a brief period (minutes to 12 hours) with the patient regaining consciousness between seizures, which were readily recognizable by the patient or a trained caregiver. ARS includes seizures sometimes referred to as serial, cluster, crescendo, or stuttering prolonged.

Time frame: At Visit 2 and subsequent visits in the Double-blind Period

Population: All randomized participants for whom an attempt (successful or not) was made to administer study drug for an episode of ARS during the Double-blind Period.

ArmMeasureValue (MEAN)Dispersion
DiazepamMean Score on Physician Global Treatment Assessment During the Double-blind Period6.3 Units on a scaleStandard Deviation 2.45
PlaceboMean Score on Physician Global Treatment Assessment During the Double-blind Period5.5 Units on a scaleStandard Deviation 2.69
p-value: 0.04595% CI: [0.02, 1.56]ANOVA
Secondary

Mean Score on Physician Global Treatment Assessment During the Open-label Period

Physician global evaluation is based on seizure frequency, severity, and overall outcome compared with previous episodes and is rated on a 10-cm visual analogue scale, where 0=much worse and 10=much better. A higher score indicates greater improvement. An episode of acute repetitive seizures (ARS) is defined as an episode of multiple complex, partial, or generalized seizures occurring over a brief period (minutes to 12 hours) with the patient regaining consciousness between seizures, which were readily recognizable by the patient or a trained caregiver. ARS includes seizures sometimes referred to as serial, cluster, crescendo, or stuttering prolonged.

Time frame: From Visit 2 and subsequent visits in the Open-label Period to discharge or study termination

Population: All randomized participants for whom an attempt (successful or not) was made to administer study drug for an ARS event during the Open-label Period and who were available for evaluation.

ArmMeasureValue (MEAN)Dispersion
DiazepamMean Score on Physician Global Treatment Assessment During the Open-label Period6.87 Units on a scaleStandard Deviation 1.645
Secondary

Number of Participants Requiring Emergency Department Visits During the Double-blind Period

Any use of emergency treatment (such as an emergency room visit) was recorded in the patient's diary, along with the date, time, and reason for the emergency treatment. Emergency department visits required some type of rescue action taken, other than the visit itself. An episode of acute repetitive seizures (ARS) was defined as an episode of multiple complex, partial, or generalized seizures occurring over a brief period (minutes to 12 hours) with the patient regaining consciousness between seizures, which were readily recognizable by the patient or a trained caregiver. ARS includes seizures sometimes referred to as serial, cluster, crescendo, or stuttering prolonged.

Time frame: From 15 minutes to 12 hours following study drug administration for onset of an episode of ARS during the Double-blind Period

Population: All randomized participants for whom an attempt (successful or not) was made to administer study drug for an episode of ARS during the Double-blind Period.

ArmMeasureValue (NUMBER)
DiazepamNumber of Participants Requiring Emergency Department Visits During the Double-blind Period2 Participants
PlaceboNumber of Participants Requiring Emergency Department Visits During the Double-blind Period4 Participants
p-value: 0.443Fisher Exact
Secondary

Number of Participants Requiring Emergency Department Visits During the Open-label Period

Any use of emergency treatment (such as an emergency room visit) was recorded in the patient's diary, along with the date, time, and reason for the emergency treatment. Emergency department visits required some type of rescue action taken, other than the visit itself.

Time frame: From 15 minutes to 12 hours after study drug administration for onset of an episode of ARS during the Open-label Period

Population: All randomized participants for whom an attempt (successful or not) was made to administer study drug for an ARS event during the Open-label Period.

ArmMeasureValue (NUMBER)
DiazepamNumber of Participants Requiring Emergency Department Visits During the Open-label Period13 Participants
Secondary

Number of Participants Requiring Rescue Medical Care Other Than Medication or Emergency Department Visits During the Open-label Period

Other rescue medical care consisted of care other than rescue medication or emergency department visits. Each patient's specific criteria for seizure and an episode of acute repetitive seizure (ARS) were determined by the Investigator. Patients and their caregivers were trained to use these criteria to recognize the onset of an episode of ARS and when and how to administer study drug.

Time frame: From 15 minutes to 12 hours after study drug administration for onset of an episode of ARS during the Open-label Period

Population: All randomized participants for whom an attempt (successful or not) was made to administer study drug for an ARS event during the Double-blind Period.

ArmMeasureValue (NUMBER)
DiazepamNumber of Participants Requiring Rescue Medical Care Other Than Medication or Emergency Department Visits During the Open-label Period5 Participants
Secondary

Number of Participants Requiring Rescue Medical Care Other Than Rescue Medication or Emergency Department Visits During the Double-blind Period

Other rescue medical care consisted of care other than rescue medication or emergency department visits. Each patient's specific criteria for seizure and an episode of acute repetitive seizure (ARS) were determined by the Investigator. Patients and their caregivers were trained to use these criteria to recognize the onset of an episode of ARS and when and how to administer study drug. An episode of ARS was defined as an episode of multiple complex, partial, or generalized seizures occurring over a brief period (minutes to 12 hours) with the patient regaining consciousness between seizures, which were readily recognizable by the patient or a trained caregiver. ARS includes seizures sometimes referred to as serial, cluster, crescendo, or stuttering prolonged.

Time frame: From 15 minutes to 12 hours following study drug administration for an episode of ARS during the Double-blind Period

Population: All randomized participants for whom an attempt (successful or not) was made to administer study drug for an ARS event during the Double-blind Period.

ArmMeasureValue (NUMBER)
DiazepamNumber of Participants Requiring Rescue Medical Care Other Than Rescue Medication or Emergency Department Visits During the Double-blind Period0 Participants
PlaceboNumber of Participants Requiring Rescue Medical Care Other Than Rescue Medication or Emergency Department Visits During the Double-blind Period2 Participants
p-value: 0.245Fisher Exact
Secondary

Number of Participants Requiring Rescue Medication During the Double-blind Period

If seizure control following study drug administration was inadequate, diazepam rectal gel was provided as a rescue medication, given only in the first 4 hours after study drug administration and only if the caregiver was directed to do so by the Investigator or designee at the time of the acute repetitive seizure (ARS) episode. Each patient's specific criteria for seizure and an episode of ARS were determined by the Investigator. Patients and their caregivers were trained to use these criteria to recognize the onset of an episode of ARS and when and how to administer study drug. An episode of ARS was defined as an episode of multiple complex, partial, or generalized seizures occurring over a brief period (minutes to 12 hours) with the patient regaining consciousness between seizures, which were readily recognizable by the patient or a trained caregiver. ARS includes seizures sometimes referred to as serial, cluster, crescendo, or stuttering prolonged.

Time frame: From 15 minutes to 12 hours following study drug administration for an episode of ARS during the Double-blind Period

Population: All randomized participants for whom an attempt (successful or not) was made to administer study drug for an ARS during the Double-blind Period.

ArmMeasureValue (NUMBER)
DiazepamNumber of Participants Requiring Rescue Medication During the Double-blind Period14 Participants
PlaceboNumber of Participants Requiring Rescue Medication During the Double-blind Period24 Participants
p-value: 0.066Fisher Exact
Secondary

Number of Participants Requiring Rescue Medication During the Open-label Period

Each patient's specific criteria for seizure and an episode of acute repetitive seizure (ARS) were determined by the Investigator. Patients and their caregivers were trained to use these criteria to recognize the onset of an episode of ARS and when and how to administer study drug. If seizure control following study drug administration was inadequate, diazepam rectal gel was provided as a rescue medication, given only in the first 4 hours after study drug administration and only if the caregiver was directed to do so by the Investigator or designee at the time of the ARS episode.

Time frame: From 15 minutes to 12 hours after study drug administration during the Open-label Period

Population: All randomized participants in whom an attempt (successful or not) was made to administer study drug for an ARS episode during the Open-label Period of the study.

ArmMeasureValue (NUMBER)
DiazepamNumber of Participants Requiring Rescue Medication During the Open-label Period39 Participants

Source: ClinicalTrials.gov · Data processed: Mar 22, 2026