Intravenous Levetiracetam as First-line Anticonvulsive Treatment in Patients With Non-convulsive Status Epilepticus (Keppra)

This study has been withdrawn prior to enrollment.
Sponsor:
Collaborators:
University Hospital, Basel, Switzerland, Dr. med. Stephan Rüegg, Neurology
Clinical Trial Unit, University Hospital Basel, Switzerland
Information provided by:
University Hospital, Basel, Switzerland
ClinicalTrials.gov Identifier:
NCT00603135
First received: November 13, 2007
Last updated: March 4, 2010
Last verified: March 2010
  Purpose

Status epilepticus (SE) represents the most common life-threatening neurological emergency requiring treatment on an intensive care unit. The incidence in Western European countries is about 12-18/100'000. Immediate and effective treatment of SE is obviously essential because of the deleterious effects of continuous seizures on the brain and the whole organism. Guidelines emphasize the use of benzodiazepines (BZD) as first-line anticonvulsive drugs. Alternatively, i/v Phenytoin (PHE), fosphenytoin (FOS), and valproate (VPA) were also tested as first-line anticonvulsants in SE. Direct comparison of PHE with lorazepam (LZP) showed significant superiority of LZP (evidence class I). Other trials i/v PHE or -VPA are of evidence class III or IV. BZD, VPA, and PHE have clinical and pharmacological disadvantages. BZD may cause respiratory depression or sedation and may be not suitable for patients with COPD or ambiguous in patients with BZD addiction. Some compounds also may induce tachyphylaxis or accumulate under concomitant renal failure. PHE has saturable metabolism subject to Michaelis-Menten kinetics increasing the risk of overdosing in an acute setting causing liver damage, serious cardiac arrhythmias, hypotension, cerebellar degeneration, peripheral neuropathy and local/systemic skin reactions. Although of unequivocal efficacy, PHE should no longer be used for long-term because of its adverse effects after chronic administration (irreversible cerebellar degeneration causing debilitating ataxia, painful polyneuropathy, and osteopenia increasing the risk of fractures). Metabolism by and self-induction of the hepatic CYP450 system make PHE prone to interactions with several other drugs, notably other antiepileptics. VPA may cause liver failure, hemorrhagic complications, pancreatitis, and hyperammonemic encephalopathy. To summarize, these three first-line agents for the treatment of SE may cause serious side effects in several patients with SE.

Levetiracetam (LEV) is broad-spectrum antiepileptic drug. It binds to the presynaptic vesicular protein 2A abundantly present in different regions of the brain; LEV presynaptically modulates transmitter release, but the exact mechanism(s) remain unclear. Data also revealed that LEV stabilizes GABAA receptors upon repetitive activation what is important in treatment of SE because GABAA receptors undergo significant changes of subunit conformation within minutes after sustained activation like during SE. These changes render GABAA receptors the less anticonvulsive, the longer SE lasts. Levetiracetam has a favorable pharmacological profile with large safety margins. Its partly extrahepatic hydrolyzation bypasses the CYP450 system; renal excretion is 60-70% unchanged, and 23-27% metabolized. Dosage needs adjustment when renal function is impaired. LEV lacks interactions with any drugs yet. Drowsiness is the most common side-effect while respiration, liver and kidney function, and the blood system are not affected. LEV shows an important clinical effect even after the first dose and maximal efficacy within the first week of drug-intake. The favorable clinico-pharmacological profile predilects LEV for the first-line treatment of SE, especially in patients with multi-organ failure, sepsis, coma etc.. About 10 % of comatous patients may be in non-convulsive SE (NCSE) on ICU's. These patients are under polymedication whereby interactions of the anticonvulsants approved yet for the treatment of NCSE with their other drugs may have fatal effects. Conversely, non-interacting anticonvulsants would represent an advantage for the treatment of NCSE for these patients.

Recently, the i/v formulation of LEV was approved by the FDA for the use in patients, but not specifically for the treatment of SE. Data about the single-dose bioavailability of i/v-LEV in comparison to oral tablets as well as multiple-dose pharmacokinetics and tolerability in healthy subjects were recently published. In addition, the administration of i/v-LEV dosages ranging from 2000-4000 mg within 15 minutes and of dosages ranging from 1500-2500 mg within 5 minutes was safe and well tolerated, and led to efficacious drug levels in a randomized, single-blind, placebo-controlled safety and pharmacokinetic study in healthy volunteers.

Slight somnolence is expected to be the only adverse effect of i/v LEV, sharply contrasting with the sedation up to coma after i/v benzodiazepines. Thus, even severely ill patients will be accessible to neurological tests under LEV which is a big advantage in this clinical difficult setting of NCSE.

I-v LEV is considered an ideal candidate for the first-line use (before benzodiazepines) in patients with NCSE, especially in those with important comorbidity and concomitant polymedication. Thus, we would like to test the feasibility, safety, and efficacy of i/v-LEV as first-line medication in a open-label, single-center, prospective pilot study as outlined below.


Condition Intervention Phase
Status Epilepticus, Non-Convulsive
Drug: first-line i/v-levetiracetam
Phase 2

Study Type: Interventional
Study Design: Endpoint Classification: Safety/Efficacy Study
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: Intravenous Levetiracetam as First-line Anticonvulsive Treatment in Patients With Non-convulsive Status Epilepticus

Resource links provided by NLM:


Further study details as provided by University Hospital, Basel, Switzerland:

Primary Outcome Measures:
  • Efficacy/ Clinical and/or electroencephalographic cessation of SE [ Time Frame: 30 min ] [ Designated as safety issue: Yes ]

Secondary Outcome Measures:
  • safety [ Time Frame: 48 hrs ] [ Designated as safety issue: Yes ]

Estimated Enrollment: 20
Study Start Date: January 2008
Estimated Study Completion Date: March 2010
Estimated Primary Completion Date: July 2009 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: A Drug: first-line i/v-levetiracetam
No effect after 30 min, standard therapy with f.e. lorazepam for NCSE

  Eligibility

Ages Eligible for Study:   20 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria:

  • Patients 18 years old or older with NCSE. NCSE includes the following subtypes:

    • simple partial NCSE
    • complex partial status epilpeticus
  • Absence status
  • NCSE in critical illness
  • Written informed consent should be signed.

Exclusion Criteria:

  • Age below 20
  • Known intolerance to the study drug levetiracetam
  • Known pregnancy
  • Postanoxic SE
  • Subtle SE
  Contacts and Locations
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Please refer to this study by its ClinicalTrials.gov identifier: NCT00603135

Locations
Switzerland
University Hospital Basel
Basel, Switzerland, 4031
Sponsors and Collaborators
University Hospital, Basel, Switzerland
University Hospital, Basel, Switzerland, Dr. med. Stephan Rüegg, Neurology
Clinical Trial Unit, University Hospital Basel, Switzerland
Investigators
Principal Investigator: Stephan Rüegg, MD Neurology
Study Chair: Stephan Rüegg, MD Neurology
  More Information

Publications:
Responsible Party: Dr. med. Stephan Rüegg, Neurology,University Hospital Basel
ClinicalTrials.gov Identifier: NCT00603135     History of Changes
Other Study ID Numbers: MNeuro_Keppra_, EKBB 272/27
Study First Received: November 13, 2007
Last Updated: March 4, 2010
Health Authority: Switzerland: Swissmedic
Switzerland: Ethikkommission

Additional relevant MeSH terms:
Status Epilepticus
Epilepsy
Brain Diseases
Central Nervous System Diseases
Nervous System Diseases
Etiracetam
Piracetam
Anticonvulsants
Central Nervous System Agents
Therapeutic Uses
Pharmacologic Actions
Nootropic Agents
Neuroprotective Agents
Protective Agents
Physiological Effects of Drugs

ClinicalTrials.gov processed this record on September 22, 2014