We updated the design of this site on December 18, 2017. Learn more.
ClinicalTrials.gov Menu

Treatment of Chronic Bothersome Tinnitus Using Cognitive Training and D-cycloserine

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
ClinicalTrials.gov Identifier: NCT01550796
Recruitment Status : Completed
First Posted : March 12, 2012
Last Update Posted : May 23, 2013
Information provided by (Responsible Party):
Jay F. Piccirillo, MD, Washington University School of Medicine

January 25, 2012
March 12, 2012
May 23, 2013
January 2012
April 2012   (Final data collection date for primary outcome measure)
Change from baseline in Tinnitus Handicap Inventory (THI) [ Time Frame: Baseline and 5 weeks later ]
We will measure THI before and after treatment. Primary efficacy is defined by a decrease of 17 points on their THI from baseline.
Same as current
Complete list of historical versions of study NCT01550796 on ClinicalTrials.gov Archive Site
Change in Neurocognitive assessment score [ Time Frame: Baseline and 5 weeks later ]
We will measure PASAT, Stroop, and a newly designed neurocognitive computer based test at the patient's baseline visit and final visit. These assessments are done as patients with tinnitus frequently report cognitive difficulties in attention and memory. One aim of this study is to target these cognitive difficulties. Improvements in memory and attention will be assessed using these neurocognitive tests.
Change in Neurocognitive assessment score [ Time Frame: Baseline and 5 weeks later ]
We will measure PASAT, Stroop, and a newly designed neurocognitive computer based test.
Not Provided
Not Provided
Treatment of Chronic Bothersome Tinnitus Using Cognitive Training and D-cycloserine
Treatment of Chronic Bothersome Tinnitus Using Cognitive Training and D-cycloserine
The purpose of this research study is to determine if a medication along with a computer program designed to improve memory and other mental processes can help people like yourself with tinnitus. The medication that will be investigated, d-cycloserine, was developed as an antibiotic. However, more recently, research in other studies has shown that this medication may enhance learning and memory. The investigators would like to determine if computer programs designed to improve memory and attention are enhanced by this medication. In addition, the investigators hope to learn if the use of these programs can help participants with their tinnitus as well as their ability to remember and focus. All research participants will receive therapy with a computer-based program designed to improve memory and attention. Half of participants will also receive d-cycloserine while the other half of participants will receive placebo. The placebo is a sugar pill without active medication.

Tinnitus is the perception of a "ringing or hissing" sound in the absence of an acoustic stimulus affecting more than 40 million people in the United States. While the exact etiology of chronic bothersome tinnitus is unknown, current evidence based on numerous studies and neuroimaging results suggests chronic bothersome tinnitus involves the central nervous system with abnormalities in neural networks including attention and emotional networks. These neuroplastic changes in multiple neural networks may offer targets in the treatment of chronic bothersome tinnitus.

The Brain Fitness Program® (Posit Science Corporation, San Francisco, California) is a cognitive rehabilitation program that has been used in the treatment of schizophrenia and geriatric populations, and has been shown to have favorable results by reorganizing aberrant neural networks. Preliminary results from our team have shown improvements in tinnitus severity and cognitive functioning for participants with chronic bothersome tinnitus using this cognitive rehabilitation program.

Recent studies in numerous disorders have shown d-cycloserine (DCS) augments learning therapy programs by enhancing neuroplasticity. In addition, the adjuvant use of DCS with learning therapies has been found to accelerate symptom reduction decreasing the time-burden needed for learning therapies. Based on the belief that chronic bothersome tinnitus involves changes in malleable neural networks that can be targets of therapy and that DCS enhances neuroplasticity, the investigators hypothesize that adjuvant DCS with cognitive rehabilitation treatment may improve tinnitus severity and the cognitive deficits associated with chronic bothersome tinnitus.

This randomized-controlled trial will use an abbreviated cognitive rehabilitation program given for 5 weeks with DCS or placebo to evaluate the impact of a neuroplasticity-sensitizing drug on tinnitus symptom severity and cognitive performance among patients with chronic bothersome tinnitus. A positive result on this study will have numerous implications, including offering a new treatment option for chronic bothersome tinnitus with few known side effects and limited time commitment or cost.

Phase 2
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Behavioral: Cognitive Training
250 mg d-cycloserine or placebo taken orally one hour before Brain Fitness Program
Other Name: Posit Science, Brain Fitnesss Program
  • Active Comparator: d-cycloserine
    d-cycloserine 250 mg two days per week one hour prior to(cognitive training)
    Intervention: Behavioral: Cognitive Training
  • Placebo Comparator: Placebo
    Placebo pill two days per week 1 hour prior to cognitive training
    Intervention: Behavioral: Cognitive Training

*   Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
June 2012
April 2012   (Final data collection date for primary outcome measure)

Inclusion Criteria:

  • Participants must be between the ages of 35 and 65.
  • Participants must have subjective, unilateral or bilateral, non-pulsatile tinnitus for at least a duration of 6 consecutive months.
  • Participants must have bothersome tinnitus as defined by a THI ≥ 30.
  • Participants must have access to a computer for at least 60 minutes per day, 2 days per week, for five consecutive weeks.
  • Participants must be willing to work on the Brain Fitness Program® that will be provided at least 60 minutes per day, 2 days per week, for 5 consecutive weeks.
  • Participants must be willing to return for two treatment study visits during the first week after enrollment in the study and an additional study visit after 5 weeks.
  • Participants must be willing to complete the Brain Fitness Program® and other assessments as prescribed.
  • Participants must be able to read, write, and speak English fluently as the Brain Fitness Program, tinnitus assessments, and neurocognitive testing are written and administered in English.
  • Women of child-bearing age must agree to use a study-approved form of contraception and agree to not try to become pregnant during the duration of the study. If a participant becomes pregnant, they should inform the PI and will be immediately withdrawn from the study.
  • Participants must be able to provide valid informed consent.

Exclusion Criteria:

  • Participants with a tinnitus diagnosis related to a Workman's Compensation Claim or any other litigation-related situation.
  • Participants with tinnitus related to retrocochlear lesions, cochlear implants, or other unknown anatomic/structural lesions of the brain, skull base, temporal bone, or ear.
  • Participants with hearing impairment such that they are unable to hear the highest volume of the computer cognitive training program.
  • Participants with an active diagnosis of any acute or chronic central neurological condition including: Parkinson's disease, Multiple Sclerosis, Alzheimer's Disease, cerebral infarcts, traumatic brain injury, epilepsy, dementia, and/or a history of brain tumor(s).
  • Subjects who have an active diagnosis of an anxiety disorder, psychosis or any psychiatric co-morbidity that may complicate the interpretation of study results.
  • Participants with symptoms of severe depression on the Patient Health Questionnaire-9 (subjects who score >15 on the Patient Health Questionnaire-9 (PHQ-9) designed to screen for depression).
  • Active alcohol and/or drug dependence or history of alcohol and/or drug dependence within the last year.
  • Participants with kidney or liver impairment, a heart condition, porphyria, porphyria among family members, or an allergy to DCS.
  • Participants who take any medication that is contraindicated with DCS.
  • Use of any medications that may alter or affect cognition including, but not limited to, sedatives, hypnotics, narcotics, and opiates.
  • Women who are pregnant or breast-feeding.
  • People who have ever used the Brain Fitness Program® or any other computer based Brain Exercise or Brain Training programs within the prior year.
  • Use of Neuromonics device for tinnitus treatment, or currently undergoing Tinnitus Retraining (TRT) program.
  • Any condition the PI determines would render the study to not be in the best interest of the patient.
Sexes Eligible for Study: All
35 Years to 65 Years   (Adult)
Contact information is only displayed when the study is recruiting subjects
United States
Not Provided
Not Provided
Jay F. Piccirillo, MD, Washington University School of Medicine
Washington University School of Medicine
Not Provided
Principal Investigator: Jay F Piccirillo, MD Washington University School of Medicine
Washington University School of Medicine
May 2013

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP