Amantadine for the Treatment of Traumatic Brain Injury Irritability and Aggression: A Multi-site Study

2014-08-27 03:26:44 | BioPortfolio


The purpose of this study is to study the effect of amantadine on irritability and aggression caused by traumatic brain injury.


PURPOSE OF PROJECT: To study the effect of amantadine 100 mg administered twice daily compared to placebo on irritability from baseline to treatment Day 28.

SUMMARY OF PROJECT: It is anticipated that 168 subjects with 168 corresponding subject informants will be recruited for the study. Carolinas Rehabilitation, the lead center, and 5 collaborating centers will enroll approximately 28 subjects each.

Subjects will be recruited primarily from the clinics. Also, letters will be sent to patients in our data base. If the first encounter with research personnel is by telephone, the research assistant will obtain verbal (telephone) consent from the subject's informant for the Neuropsychiatric Inventory (NPI) for subject irritability. The score on this questionnaire must be ≥ 6 for qualification. This allows pre-screening to take place and avoid an unnecessary clinic visit.

Subjects who consent and qualify will be randomized in a 1:1 ratio, amantadine to placebo. Stratification to randomization group will occur based on the presence of depression defined by a Beck's Depression Inventory-II (BDI-II) score ≥ 13. Randomized subjects will receive amantadine or placebo 100 mg twice daily every morning and 12 Noon. There will be 4 clinic visits. Visits will occur at baseline, for consenting and screening, day 28, day 60 and day 90. At all 4 clinic visits, both the subject and the informant will be given questionnaires regarding the subject's behavior and mood. Follow up phone calls will occur each week that the subject is not seen in the clinic until the end of the study. Follow up phone calls will assess for study medication compliance, adverse events and concomitant medication changes. Day 60 ends the period of the Randomized Clinical Trial phase of the study and the subjects will begin the 1 month continuation phase of the study when all participants receive active amantadine.

The following questionnaires will be used as measures of irritability for the subject and the informant: Neuropsychiatric Inventory (NPI), State Trait Anger Expression Inventory (STAXI-2), and Global Impression of Change.

The following questionnaires will be dispensed to the subject only: Short Form -12, Satisfaction With Life Scale, Patient Health Questionnaire, Beck Depression Inventory, Brief Symptom Inventory, Family Assessment Device, Fatigue Impact Scale, and tests of cognitive function. The Glasgow Outcome Score-Extended will be completed by the research assistant using information obtained primarily from the informant.

The Investigator will complete the Clinical Global Impression of change at Visits 1, 2, 3, and 4.

History and Physical Exam, creatinine level (kidney function) will be obtained for safety and tolerability. Serum pregnancy tests will be drawn at screening for females of childbearing potential.

Study Design

Allocation: Randomized, Control: Placebo Control, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor), Primary Purpose: Treatment


Brain Injury


Amantadine Hydrochloride, Placebo


Spaulding Rehabilitation
United States




Carolinas Healthcare System

Results (where available)

View Results


Published on BioPortfolio: 2014-08-27T03:26:44-0400

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Medical and Biotech [MESH] Definitions

Prolonged unconsciousness from which the individual cannot be aroused, associated with traumatic injuries to the BRAIN. This may be defined as unconsciousness persisting for 6 hours or longer. Coma results from injury to both cerebral hemispheres or the RETICULAR FORMATION of the BRAIN STEM. Contributing mechanisms include DIFFUSE AXONAL INJURY and BRAIN EDEMA. (From J Neurotrauma 1997 Oct;14(10):699-713)

Acute and chronic (see also BRAIN INJURIES, CHRONIC) injuries to the brain, including the cerebral hemispheres, CEREBELLUM, and BRAIN STEM. Clinical manifestations depend on the nature of injury. Diffuse trauma to the brain is frequently associated with DIFFUSE AXONAL INJURY or COMA, POST-TRAUMATIC. Localized injuries may be associated with NEUROBEHAVIORAL MANIFESTATIONS; HEMIPARESIS, or other focal neurologic deficits.

Conditions characterized by persistent brain damage or dysfunction as sequelae of cranial trauma. This disorder may result from DIFFUSE AXONAL INJURY; INTRACRANIAL HEMORRHAGES; BRAIN EDEMA; and other conditions. Clinical features may include DEMENTIA; focal neurologic deficits; PERSISTENT VEGETATIVE STATE; AKINETIC MUTISM; or COMA.

An injury in which the damage is located on the opposite side of the primary impact site. A blow to the back of head which results in contrecoup injury to the frontal lobes of the brain is the most common type.

A form of acquired brain injury which occurs when a sudden trauma causes damage to the brain.

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