This site became the new on June 19th. Learn more.
Show more Menu IMPORTANT: Listing of a study on this site does not reflect endorsement by the National Institutes of Health. Talk with a trusted healthcare professional before volunteering for a study. Read more... Menu IMPORTANT: Talk with a trusted healthcare professional before volunteering for a study. Read more... Menu
Give us feedback

A Study of the Structure and Function of the Retina in Adult Patients With Refractory Complex Partial Seizures Treated With Vigabatrin (Sabril®)

This study has been completed.
Information provided by (Responsible Party):
Lundbeck LLC Identifier:
First received: January 14, 2011
Last updated: April 28, 2016
Last verified: April 2016
The purpose of the study is to evaluate the change in visual fields by means of automated static perimetry and to evaluate the change in retinal structure by means of spectral domain optical coherence tomography (SD-OCT) in adult patients with refractory complex partial seizures (CPS) being treated with vigabatrin (Sabril®)

Condition Intervention Phase
Adult Refractory Complex Partial Seizures Drug: Sabril Phase 4

Study Type: Interventional
Study Design: Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Supportive Care
Official Title: A Prospective, Open-label Study of the Structure and Function of the Retina in Adult Patients With Refractory Complex Partial Seizures Treated With Vigabatrin (Sabril®)

Resource links provided by NLM:

Further study details as provided by Lundbeck LLC:

Primary Outcome Measures:
  • Mean Change From Reference Value in Field Width as Measured by 30-2 SITA Fast in Field Sensitivity (Mean Deviation - MD in dB) [ Time Frame: Baseline (Month 0), Month 3, Month 6, Month 9, Month 12 ]
    Mean change from the reference value in 30-2 SITA mean deviation, which was generated using the University of Iowa Visual Field Reading Center (VFRC) normative database and the Humphrey Field Analyzer (HFA) normative database. The reference value was defined as the average of the assessments performed at Visits 1 (baseline), 2 and 3 (first month of dosing). The mean change from the reference value are presented for Months 3, 6, 9 and 12. A negative change from the reference value indicates a decrease in the central visual field.

  • Change From Reference Value in Average RNFL (Retinal Nerve Fiber Layer) Thickness (µm) as Measured by SD-OCT (Spectral Domain-Optical Coherence Tomography) [ Time Frame: Baseline (Month 0), Month 3, Month 6, Month 9, Month 12 ]
    Mean change from the reference value in average RNFL thickness (µm) as measured by SD-OCT. The reference value was defined as the average of the assessments performed at Visits 1 (baseline), 2 and 3 (first month of dosing). Thinning of the RNFL, that is, a negative change from the reference value, has been associated with ophthalmological disease.

Enrollment: 65
Study Start Date: December 2010
Study Completion Date: May 2015
Primary Completion Date: May 2015 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Sabril Drug: Sabril
Sabril: 500 mg tablets, orally. Physicians will dose their patients according to guidance provided in the product label.
Other Name: Vigabatrin

Detailed Description:

Multicenter, prospective open-label study with approximately 25 sites in the US that specialize in caring for adult patients with refractory CPS

  • Sites must have access to Humphrey static perimetry and to Spectralis SD-OCT.
  • All vision test results will be sent to the central readers for evaluation.
  • Additional study tests:

    • The Columbia Suicide Severity Rating Scale (C-SSRS)
    • The National Eye Institute Visual Field Questionnaire-39 (NEI VFQ-39)
    • A whole blood sample for specific analysis of DNA characteristics
    • An optional whole blood sample for exploratory analysis of DNA characteristics
    • Plasma samples for bioanalytical analysis of vigabatrin and blood samples for taurine biomarker analysis

Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Important Inclusion Criteria:

  1. The patient speaks English or Spanish.
  2. The patient has had no prior exposure to Sabril.
  3. To begin Sabril therapy for the treatment of CPS.
  4. Male or female ≥18 years of age.
  5. The patient has refractory CPS:

    1. The patient has complex partial epilepsy of more than 1 year duration and no other seizure type within the past year except for partial seizures secondarily generalized.
    2. The patient has failed because of lack of efficacy 3 or more prior or concurrent treatment trials including 3 or more anti-epileptic drugs (AEDs) of differing pharmacologic mechanisms administered as monotherapy or polytherapy.
    3. The patient is taking at least 1 AED. A vagal nerve stimulator is not counted as an AED.
    4. The patient reports an average of 2 or more seizures per month averaged over the prior 3 months.
  6. The patient is deemed by the treating neurologist and ophthalmologist to be able to reliably complete perimetry testing.
  7. The initial (Visit 1) SD-OCT and static perimetry readings tests must be performed and assessed for technical adequacy by the SD-OCT and perimetry central readers prior to the first dose of Sabril. The initial (Visit 1) tangent corner test must be performed prior to the first dose of Sabril.

Exclusion Criteria:

  1. Prior exposure to Sabril.
  2. Pre-existing ocular or neurological disease that might affect bilateral visual fields or interfere with perimetry (e.g., aphakia, visually significant cataract, glaucoma, diabetes mellitus, ischemic optic neuropathy, multiple sclerosis). Patients with stable visual field defects from CNS lesions (e.g., epilepsy surgery more than 6 months prior to receiving Sabril) may be enrolled.
  3. Concurrent exposure to medications with known or suspected retinal or optic nerve toxicity.
  4. Concurrent use of an investigational agent or device or such use within 30 days of entering the study.
  5. Concurrent use of the ketogenic or similar diet.
  6. For any reason, the patient is considered by the investigator to be an unsuitable candidate for the study.
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT01278173

  Hide Study Locations
United States, California
California Pacific Medical Center
San Francisco, California, United States, 94115
United States, Connecticut
Yale Medical Center
New Haven, Connecticut, United States, 06520
United States, Delaware
Dover, Delaware, United States, 19901
United States, Florida
Sunrise Clinical Research Group
Hollywood, Florida, United States, 33021-2834
University of South Florida
Tampa, Florida, United States, 33606
United States, Georgia
Peachtree Neurological Clinic
Atlanta, Georgia, United States, 30309
United States, Idaho
Idaho Comprehensive Epilepsy Center
Boise, Idaho, United States, 83702
United States, Illinois
OSF Saint Francis Medical Center
Peoria, Illinois, United States, 61637
United States, Kentucky
University of Kentucky Lexington
Lexington, Kentucky, United States, 40536
United States, Louisiana
Ochsner Clinic Foundation
New Orleans, Louisiana, United States, 70121
United States, Minnesota
Minnesota Epilepsy Group, PA
St. Paul, Minnesota, United States, 55102
United States, New Hampshire
Dartmouth-Hitchcock Medical Center
Lebanon, New Hampshire, United States, 03756
United States, New York
Columbia University Medical Center
New York, New York, United States, 10087
United States, North Carolina
Neuroscience & Spine Institute
Charlotte, North Carolina, United States, 28207
United States, Oregon
Oregon Health and Science University
Portland, Oregon, United States, 97239
United States, Pennsylvania
Thomas Jefferson University
Philadelphia, Pennsylvania, United States, 19107
United States, South Carolina
Medical University of South Carolina
Charleston, South Carolina, United States, 29425
United States, Texas
University of Texas
Houston, Texas, United States, 77030
Covenant Medical Group
Lubbock, Texas, United States, 79410
University of Texas Health Science Center
San Antonio, Texas, United States, 78229
United States, Wisconsin
Aurora BayCare Medical Center
Green Bay, Wisconsin, United States, 54308
Aurora St. Luke's Medical Center
Milwaukee, Wisconsin, United States, 53215
Sponsors and Collaborators
Lundbeck LLC
Study Director: Email contact via H. Lundbeck A/S
  More Information

Responsible Party: Lundbeck LLC Identifier: NCT01278173     History of Changes
Other Study ID Numbers: 13098A
Study First Received: January 14, 2011
Results First Received: April 28, 2016
Last Updated: April 28, 2016

Keywords provided by Lundbeck LLC:
Vigabatrin-associated vision change
Adult refractory complex partial seizures
Brain diseases
Central Nervous System Diseases
Nervous System Diseases
Neurologic Manifestations
Enzyme Inhibitors
GABA Agents

Additional relevant MeSH terms:
Brain Diseases
Central Nervous System Diseases
Nervous System Diseases
Neurologic Manifestations
Signs and Symptoms
Enzyme Inhibitors
Molecular Mechanisms of Pharmacological Action
GABA Agents
Neurotransmitter Agents
Physiological Effects of Drugs processed this record on June 22, 2017