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Study to Investigate the Safety and Efficacy of Lithium in Volunteers With Amyotrophic Lateral Sclerosis (ALS)

This study has been terminated.
(NINDS DSMB recommended trial be terminated for futility after reviewing an interim analysis of 84 subjects.)
Sponsor:
Collaborators:
ALS Association
ALS Society of Canada
University of Toronto
State University of New York - Upstate Medical University
Columbia University
University of Kentucky
Information provided by:
Massachusetts General Hospital
ClinicalTrials.gov Identifier:
NCT00818389
First received: January 6, 2009
Last updated: March 18, 2011
Last verified: March 2011
Results First Received: May 10, 2010  
Study Type: Interventional
Study Design: Allocation: Randomized;   Endpoint Classification: Safety/Efficacy Study;   Intervention Model: Crossover Assignment;   Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor);   Primary Purpose: Treatment
Condition: Amyotrophic Lateral Sclerosis
Interventions: Drug: Lithium Carbonate
Drug: Riluzole
Drug: placebo

  Participant Flow


  Baseline Characteristics
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Population Description
Explanation of how the number of participants for analysis was determined. Includes whether analysis was per protocol, intention to treat, or another method. Also provides relevant details such as imputation technique, as appropriate.
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Reporting Groups
  Description
Lithium + Riluzole Subjects randomized to lithium + riluzole were required to be taking riluzole 50 milligrams (mg) twice per day at least 30 days prior to the screening visit and during the trial. Lithium carbonate and matching placebo were supplied in 150 mg capsules. Dosing started at 450 mg/day (1 capsule taken in the a.m. and 2 capsules taken in the p.m.), titrated to maintain plasma lithium levels of 0.4 - 0.8 milliequivalent per liter (mEq/L). The number of capsules taken per day was titrated individually for each patient based on blood testing to maintain plasma levels of lithium = 04. - 0.8 milliequivalent per liter (mEq/L).
Placebo + Riluzole Participants randomized to placebo + riluzole were required to be taking riluzole 50 milligrams (mg) twice per day at least 30 days prior to the screening visit and during the trial. Matching placebo was supplied in 150 mg capsules. Dosing started at 450 mg/day (1 capsule in the a.m. and 2 capsules in the p.m). Paired sham dosage modifications were made for placebo subjects, i.e. all subjects randomized to placebo were 'paired' with a lithium subject and underwent identical dosage changes to maintain blinding.
Total Total of all reporting groups

Baseline Measures
    Lithium + Riluzole     Placebo + Riluzole     Total  
Number of Participants  
[units: participants]
  40     44     84  
Age  
[units: Years]
Mean ± Standard Deviation
  58.3  ± 10.2     55.5  ± 11.9     56.24  ± 11.16  
Gender  
[units: participants]
     
Female     10     20     30  
Male     30     24     54  
Ethnicity (NIH/OMB)  
[units: Participants]
     
Hispanic or Latino     0     2     2  
Not Hispanic or Latino     40     42     82  
Unknown or Not Reported     0     0     0  
Race (NIH/OMB)  
[units: Participants]
     
American Indian or Alaska Native     0     0     0  
Asian     0     0     0  
Native Hawaiian or Other Pacific Islander     0     0     0  
Black or African American     1     2     3  
White     39     42     81  
More than one race     0     0     0  
Unknown or Not Reported     0     0     0  
ALS Functional Rating Scale-Revised (ALSFRS-R) [1]
[units: Scores on a scale]
Mean ± Standard Deviation
  38.4  ± 4.6     36.5  ± 5.7     37.43  ± 5.24  
Vital Capacity [2]
[units: Percent of predicted normal]
Mean ± Standard Deviation
  94.0  ± 18.1     86.9  ± 16.9     90.18  ± 18.20  
[1] ALSFRS-R is an ordinal rating scale questionnaire (rating 0-4) used to determine subject's assessment of their capability and independence in 12 functional activities (i.e. this is a patient-reported questionnaire scale of disability). Each question has a rating of 0-4 with 4 being the most functional and 0 being the least functional. The most functional total score is 48.
[2] Vital capacity (VC) testing is a measure of lung function that is performed using a standard spirometer and the Slow VC method. Three trials were required (5 maximum); the best of 3 was used.



  Outcome Measures
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1.  Primary:   Amyotrophic Lateral Sclerosis Functional Rating Scale - Revised Questionnaire (ALSFRS-R)   [ Time Frame: 9 months: Baseline to study termination (January 2009 - October 2009) ]

2.  Secondary:   Amyotrophic Lateral Sclerosis Functional Rating Scale - Revised Questionnaire(ALSFRS-R)   [ Time Frame: 9 months: Baseline to study termination (January 2009 - October 2009) ]

3.  Secondary:   Vital Capacity (VC) (Percent of Predicted Normal)   [ Time Frame: 9 months: Baseline to study termination (January 2009- October 2009) ]


  Serious Adverse Events


  Other Adverse Events


  Limitations and Caveats
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Limitations of the study, such as early termination leading to small numbers of participants analyzed and technical problems with measurement leading to unreliable or uninterpretable data
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