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CompletedNCT00004817Updated Jun 24, 2005

Phase III Double Blind Trial of Valproate Sodium for Prophylaxis of Post Traumatic Seizures

A Phase 3 interventional study of phenytoin and valproate sodium in Post-Traumatic Seizure Disorder and Head Injuries, sponsored by National Institute of Neurological Disorders and Stroke (NINDS). Completed. Open to participants aged 14 Years and older. Per ClinicalTrials.gov, last updated 2005-06-24.

Sponsored by National Institute of Neurological Disorders and Stroke (NINDS) · Phase 3, Interventional, and Treatment

Phase
Phase 3
Study type
Interventional
Enrollment
385
Ages
14 Years and older
Sex
All
01

Study summary

OBJECTIVES: I. Determine whether treating head injured patients with valproate sodium will reduce the risk of developing seizures as a result of the head injury.

II. Determine the safety of valproate, the appropriate dose, and the effect valproate may have on the recovery of the brain's ability to compute numbers, solve problems, remember information, and control the movement of limbs after head injury.

Read the detailed description

PROTOCOL OUTLINE: This is a randomized, double blind trial involving 3 treatment groups.

On day 1, controls receive phenytoin IV over 1 hour. On days 2 through 7, controls receive 2 doses each of phenytoin and placebo daily, intravenously. From day 8 through 6 months, controls receive placebo IV 4 times daily, then placebo tablets are administered.

On day 1, the experimental group receives a loading dose of valproate sodium intravenously over 1 hour within 24 hours of injury. Then, patients are divided into 2 subgroups.

From day 2 through 1 month, one group of patients receives valproate IV 4 times daily over 1 hour until tablets are tolerated. Patients receive placebo tablets by mouth 4 times daily from month 2 through month 6.

On day 2, the other group of patients receives valproate IV 4 times daily and continues for 6 months until tablets (same dose) are tolerated.

If patients remain seizure free between day 8 and 6 months, the number of valproate or placebo tablets are tapered over 1 week.

Each patient receives a full neuropsychological and psychosocial examination at 1, 6, and 12 months after injury.

Untreated observation of patients continues until 2 years after injury.

02

Conditions studied

  • Post-Traumatic Seizure Disorder
  • Head Injuries

Keywords

  • neurologic and psychiatric disorders
  • rare disease
  • seizures
03

In context

Seizures

881 studies on the registry are indexed under Seizures; 143 are open to participants now.

This study's enrollment of 385 is above the median of 64 across 610 interventional studies indexed under Seizures.

Browse Seizures studies →

Lead sponsor

National Institute of Neurological Disorders and Stroke (NINDS) is the lead sponsor of 592 studies on the registry; 56 are open to participants now.

Of its 18 completed or terminated interventional studies of FDA-regulated products, 8 (44%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
14 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Eligibility criteria

PROTOCOL ENTRY CRITERIA:

--Disease Characteristics--

Any patient developing the following conditions within 24 hour postinjury:

  • Cortical contusion
  • Depressed skull fracture
  • Subdural hematoma
  • Epidural hematoma
  • Intracerebral hematoma
  • Penetrating head wound
  • Seizures occurring subsequent to head injury

--Prior/Concurrent Therapy--

  • No antiseizure medication prior to injury or between the injury and study drug loading
  • Surgery: No prior neurosurgical operation for which the skull and dura mater were opened

--Patient Characteristics--

  • Age: 14 and over
  • Hematopoietic: No abnormal coagulation profile
  • Hepatic: No history of chronic or alcoholic liver disease Adequate liver function as indicated by ALT less than 1.5 times the upper limit of normal
  • Other: Not pregnant No injuries greater than 24 hours old No history of seizures prior to injury No prior history of significant head injury or neurological condition requiring medical attention
05

Study design

Phase
Phase 3
Primary purpose
Treatment
Enrollment
385 participants

Interventions

  • Drugphenytoin
  • Drugvalproate sodium
06

Study locations

No study locations are listed for this record.

07

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jun 24, 2005, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
08

Registry details

Key details

Study ID
NCT00004817
Lead sponsor
National Institute of Neurological Disorders and Stroke (NINDS)
Collaborators
Harborview Injury Prevention and Research Center
First posted
Feb 25, 2000
Start date
Feb 1991
Last update
Jun 24, 2005

Study contacts

H. Richard Winn
study chair · Harborview Injury Prevention and Research Center
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Dec 2001. You cannot join it, but the record below documents what was studied.

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