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CompletedNCT03099590AlkontrolUpdated Jul 29, 2020

Alkontrol-herbal Effects on Alcohol Drinking

A Phase 2 interventional study of kudzu extract, puerarin and Placebo control in Alcohol Drinking, Alcohol Use Disorder and Alcohol Abstinence, sponsored by Mclean Hospital. Completed at 1 site in United States. Open to participants aged 21 Years to 60 Years. Per ClinicalTrials.gov, last updated 2020-07-29.

Sponsored by Mclean Hospital · Phase 2, Interventional, and Treatment

Phase
Phase 2
Study type
Interventional
Enrollment
28
Allocation
Randomized
Ages
21 Years to 60 Years
Sex
All
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Study summary

Participants will enroll in a 14-week study (2 weeks of baseline, 8 weeks of treatment, and 4 weeks of follow-up) investigating the impact that Alkontrol-herbal (Isoflavone; Kudzu) has on alcohol intake in a population seeking treatment for an alcohol use disorder.

Read the detailed description

Over the past 15 years, the Behavioral Psychopharmacology Research Lab at McLean Hospital has extensively studied kudzu extract and demonstrated its safety and efficacy in healthy control subjects as well as in heavy binge drinkers. The relative success of our recent outpatient trial of kudzu extract demonstrated a modest decrease in drinking, reduction in the number of heavy drinking days, and significant increase in the number of days abstinent. This suggests that Alkontrol-herbal, kudzu extract, may be a useful adjunct in treating alcohol use disorders.

Participants will enroll in a 14-week study (2 weeks of baseline, 8 weeks of treatment, and 4 weeks of follow-up) investigating the impact that Alkontrol-herbal has on alcohol intake in a population (age 21-60 years) seeking treatment for an alcohol use disorder. Participants will take 500 mg of a crude kudzu extract (NPI-031, Alkontrol-herbal; Natural Pharmacia International, Burlington, MA) t.i.d.; matched sugar beet placebo capsules will serve as placebo. Subjects will come to the lab three times a week to provide urine samples that can be tested for medication compliance through a biochemical marker, acetazolamide, included in the medication capsules. Participants will record their alcohol intake through daily diaries and a wrist actigraphy device, which will also monitor their sleep/wake activity.

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Conditions studied

  • Alcohol Drinking
  • Alcohol Use Disorder
  • Alcohol Abstinence
03

In context

Alcoholism

1,606 studies on the registry are indexed under Alcoholism; 329 are open to participants now.

This study's enrollment of 28 is below the median of 87 across 1,371 interventional studies indexed under Alcoholism.

Browse Alcoholism studies →

Lead sponsor

Mclean Hospital is the lead sponsor of 181 studies on the registry; 32 are open to participants now.

Of its 14 completed or terminated interventional studies of FDA-regulated products, 10 (71%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
21 Years to 60 Years
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Subject can understand and comply with the protocol
  • Good physical and mental health (normal physical exam, ECG, blood and urine chemistries, including absence of history or laboratory evidence of diabetes)
  • Body Mass Index between 18-30, inclusive
  • Age 21-60 years (age will be verified by driver's license or other valid form of identification)
  • Meet criteria for current Moderate or Severe (4+ symptoms) Alcohol Use Disorder per the DSM-5; If attending a self-help treatment group (e.g., AA) at time of the screening visit, subject must agree to continue attending these groups for the duration of the study
  • Seeking treatment for an Alcohol Use Disorder
  • Drink 20-35 (or more) drink per week
  • Report drinking on 80% of days in the past 90 days
  • Have a stable living situation with current postal address

Exclusion criteria

Exclusion Criteria:

  • Subject meets DSM-5 criteria for major depression and/or bipolar disorder, and is not medically, pharmacologically, or clinically stable. Subjects who currently meet criteria for minor depression or bipolar disorder and have been clinically stable (including medications) for the past 2 months may participate in the study, at the investigator's discretion
  • Concurrent diagnosis of any other Axis I disorder, including any substance use disorder besides alcohol use disorder Maintained on an antipsychotic or anti-seizure medication; Current prescription for benzodiazepines
  • Presence of neurological, infectious, or neoplastic disease or a chronic medical disorder
  • Tobacco use greater than 10 cigarettes per day
  • Currently abstaining from consuming alcoholic beverages longer than 10 days
  • History of major head trauma resulting in cognitive impairment or history of seizure disorder
  • Heavy caffeine use (greater than 500 mg on a regular, daily basis)
  • Subject has active hepatitis and/or aspartate aminotransferase (AST), alanine aminotransferase (ALT) > 3x the upper limit of normal
  • For female volunteers, a positive pregnancy test (female subjects must agree to an approved method of contraception for the duration of the study)
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Study design

Phase
Phase 2
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Double (Participant, Care provider)
Enrollment
28 participants (actual)

Study arms

  • Experimental
    Active Treatment, Alkontrol-herbal

    Alkontrol-herbal, a kudzu extract which contains 19% puerarin, 4% daidzin and 2% daidzein, so each capsule contains a total of 25% active isoflavones or 125 mg.

    Dietary Supplement: kudzu extract, puerarin

  • Placebo comparator
    Placebo Control

    Matched dextran containing capsules will serve as placebo.

    Dietary Supplement: Placebo control

Interventions

  • Dietary supplementkudzu extract, puerarin

    Capsules containing 500 mg of a crude kudzu extract (NPI-031, Alkontrol-herbal; Natural Pharmacia International, Burlington, MA) will be used, containing 19% puerarin, 4% daidzin and 2% daidzein, so each capsule contains a total of 25% active isoflavones or 125 mg.

    Also known as: Alkontrol-herbal

  • Dietary supplementPlacebo control

    Matched sugar beet placebo capsules will serve as placebo.

06

What researchers measure

Primary outcomes

  1. percent days abstinent

    percent days abstinent from alcohol

    Time frame: change from baseline to post 8 weeks of treatment

  2. drinks/day

    number of alcoholic drinks/day reported

    Time frame: change from baseline to post 8 weeks of treatment

  3. number (or percent) of heavy drinking days

    number (or percent) of heavy drinking days

    Time frame: change from baseline to post 8 weeks of treatment

  4. percent days abstinent

    percent days abstinent from alcohol

    Time frame: change from baseline to 4 weeks follow-up post-treatment

  5. drinks/day

    number of alcoholic drinks/day reported

    Time frame: change from baseline to 4 weeks follow-up post-treatment

  6. number (or percent) of heavy drinking days

    number (or percent) of heavy drinking days

    Time frame: change from baseline to 4 weeks follow-up post-treatment

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Study locations

1 site
  • McLean Hospital
    Belmont, Massachusetts 02478, United States
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References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jul 29, 2020, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT03099590
Lead sponsor
Mclean Hospital
Responsible party
Scott Lukas (Director - McLean Imaging Center, Mclean Hospital) — Principal investigator
First posted
Apr 4, 2017
Start date
Jan 1, 2018
Primary completion
Mar 1, 2020
Completion
Jul 1, 2020
Last update
Jul 29, 2020

Oversight

Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in Jul 2020. You cannot join it, but the record below documents what was studied.

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