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High Dose Vitamin B1 to Reduce Abusive Alcohol Use (B1AS)

This study has been completed.
Information provided by (Responsible Party):
Ann Manzardo, PhD, University of Kansas Identifier:
First received: May 15, 2008
Last updated: September 23, 2014
Last verified: September 2014
May 15, 2008
September 23, 2014
July 2008
August 2011   (Final data collection date for primary outcome measure)
Change in Average Daily Alcohol Consumption [ Time Frame: Change from Baseline to 6 Months ]
measured as standard drinks of alcohol per day (SD/day)
Days of drinking [ Time Frame: 6 Months ]
Complete list of historical versions of study NCT00680121 on Archive Site
  • Alcoholism Severity Scale [ Time Frame: 6 Months ]
    The alcoholism severity scale measures the severity of a person's dependence to alcohol. The scale ranges from a score of 0 (least severe) to 33 (most severe). The higher the score the worse the dependence.
  • Barrett Impulsivity Scale: Total Impulsiveness [ Time Frame: 6 Months ]
    Scale measures impulsiveness. It includes 30 items that are scored to yield six first-order factors (attention, motor, self-control, cognitive complexity, perseverance, and cognitive instability impulsiveness) and three second-order factors (attentional, motor, and non-planning impulsiveness). Items are scored on a 4 point scale with 1 point equaling rarely/never up to 4 points equaling almost always/always. Total impulsivity score ranges from 30 (least impulsive) to 120 (most impulsive). The higher the score the higher the level of impulsiveness.
  • Symptom Checklist-90 (SCL-90): Global Severity Index [ Time Frame: 6 Months ]
    The SCL-90 is a brief multidimensional self-report inventory that screens for nine symptoms of psychopathology and provides three global distress indicators. It provides an overview of symptom severity and intensity. The outcome measures psychiatric symptoms using a 30-item scale reported as t-scores relative to a normative population.
Drinking severity scale, Beck depression scale, Barrett Impulsivity Scale, Breathalyzer Positive Tests [ Time Frame: 6 Months ]
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High Dose Vitamin B1 to Reduce Abusive Alcohol Use
The Effectiveness of Benfotiamine in Reducing Abusive Drinking Among Family History Positive and Negative Alcoholics
B1AS tests the hypothesis that increased vitamin B1 (thiamine) intake can repair brain systems damaged by alcohol and help people with alcohol problems control their alcohol use. A strong, man-made form of thiamine (Benfotiamine) is used to increase blood thiamine to much higher levels than can be achieved using normal vitamin supplements. Drinking patterns are examined over 6 months of continued supplement use. Men and women with a recent history of alcohol problems are eligible to participate.
B1AS is a randomized, double-blind placebo-controlled clinical trial of the effectiveness of Benfotiamine at reducing abusive drinking patterns in individuals with recent alcohol problems. Subjects consume 4 tablets of Benfotiamine (600 mg) or placebo daily for 6 months. Monthly follow-ups track alcohol use and alcohol-related problems over the 6 months. Blood tests are also conducted to determine the frequency of an inherited abnormality in thiamine processing that may be related to the risk of developing alcoholism.
Phase 4
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double Blind (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
  • Drug: Benfotiamine
    Benfotiamine 600 mg
  • Drug: Placebo
  • Placebo Comparator: Control Group
    Intervention: Drug: Placebo
  • Experimental: Benfotiamine
    Benfotiamine 600 mg
    Intervention: Drug: Benfotiamine
Manzardo AM, Pendleton T, Poje A, Penick EC, Butler MG. Change in psychiatric symptomatology after benfotiamine treatment in males is related to lifetime alcoholism severity. Drug Alcohol Depend. 2015 Jul 1;152:257-63. doi: 10.1016/j.drugalcdep.2015.03.032. Epub 2015 Apr 8.

*   Includes publications given by the data provider as well as publications identified by Identifier (NCT Number) in Medline.
April 2013
August 2011   (Final data collection date for primary outcome measure)

Inclusion Criteria:

  • Problem drinking in the last 30 days

Exclusion Criteria:

  • Prolonged abstinence
  • Serious medical problems
Sexes Eligible for Study: All
18 Years to 60 Years   (Adult)
Contact information is only displayed when the study is recruiting subjects
United States
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Ann Manzardo, PhD, University of Kansas
University of Kansas
Not Provided
Principal Investigator: Ann Manzardo, PhD University of Kansas Medical Center
University of Kansas Medical Center
September 2014

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