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Active, Not Recruiting

NCT Number: NCT05134857

The Zonisamide and Reinforcement for Reducing Alcohol Use (ZARRA) Study

A phase II randomized, double-blind, placebo-controlled clinical trial (RCT) to evaluate the ability of zonisamide (ZON) to decrease alcohol use among treatment-seeking adults with an alcohol use disorder (AUD).

Active, Not Recruiting

This study is active but is not currently recruiting participants.

Key information

Age range

18 year–65 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 2

Primary location

Washington State University

Spokane, Washington, 99202, United States

About this study

This project focuses on the efficacy of a promising pharmacotherapy (ZON) for AUDs using a placebo-controlled design that will rigorously measure alcohol use and medication adherence. Results will guide novel mechanistic targets to better capture the heterogeneity within AUDs. This project will evaluate the ability of ZON to treat the alcohol use disorder.

The investigators hypothesize that the group assigned to ZON associated with the standard treatment (ZON+ST) will yield lower rates of biochemically verified alcohol use, fewer self-reported drinks per day, and fewer heavy drinking days during the 12-week treatment and 1-year follow-up periods, relative to the placebo associated with the standard treatment (PLO+ST) group.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Four or more standard drinks on four or more occasions in the prior 30 days.
  • Seeking AUD treatment.
  • Aged 18-65 years.
  • DSM-5 diagnosis of AUD.
  • Ability to read and speak English.
  • Ability to provide written informed consent.
  • Breath alcohol of 0.00 during informed consent.
  • Provision of at least 1 EtG-positive urine test at any time during the induction period.
  • Non-lactating women of childbearing age using reliable form of birth control with a negative urine pregnancy test at baseline, and
  • Attended at least 4 of 6 visits during the induction period.

Exclusion criteria

  • Significant risk of dangerous alcohol withdrawal, defined as a history of alcohol detoxification or seizure in the last 12 months and expression of concern by the participant about dangerous withdrawal;
  • Currently receiving any pharmacotherapy for alcohol or in the past 30 days.
  • Current DSM-5 diagnosis of severe substance use disorder other than nicotine.
  • Suicide attempt in the last 20 years.
  • History of hypersensitivity to sulfonamide medication, Stevens-Johnson Syndrome, penicillin allergy or allergic reaction to any drug
  • Systemic autoimmune disease.
  • History of current seizure disorder (e.g., are they receiving medication currently for their seizures, have they ever been told by their provider that they have epilepsy, or do they have a history of recurring seizures in the last 5 years?).
  • Current clinically significant blood dyscrasia.
  • History of clinically significant renal calculi or renal failure; renal compromise (defined by an elevation of serum creatinine above our laboratory's limit of normal).
  • History of traumatic brain injury (TBI; e.g., ever been told by a provider that they had a moderate or severe TBI, lost consciousness for 30 minutes or longer or had a post-traumatic amnesia lasting a day or longer).
  • Any other current, clinically significant physical disease [i.e., neurologic, renal, rheumatologic, gastrointestinal, hematologic, pulmonary, endocrine, cardiovascular, hepatic, or autoimmune disease] on the basis of medical history, physical examination, or routine laboratory evaluation that, in the context of the study would represent a risk to the subject, or significant laboratory abnormalities related to hepatic function such as marked elevations of hepatic aminotransferase levels (i.e., AST and ALT) or direct bilirubin, and
  • Any other medical or psychiatric condition that Dr. Rodin determines would compromise safe participation.

Treatment and study plan

zonisamide

Drug

The ZON will be supplied in 100 mg capsules and deposited directly into the TAD device by research staff every 2 weeks. All participants will be told to take 100 mg/day for the first three weeks (Week 1-2 single-blind, placebo-only, induction; end of Week 2, active treatment begins) and increasing by 100 mg/day every other week (Week 4: 200 mg/day; Week 6: 300 mg/day; Week 8: 400 mg/day) up to the target dose of 500 mg/day by Week 10. The participants will be maintained on this dose through Week 14 of active treatment and then tapered off ZON (2 weeks). This dosing schedule is consistent with best practices for ZON. All TAD devices will only dispense the prescribed medication between 4pm and 11pm each night. Participants will be instructed to take the medication at or near bedtime.

Placebo

Drug

The PLO will be supplied at the same schedule and in the same manner (TAD device) as the ZON.

Primary outcomes

  1. Change in Self Reported Alcohol Consumption

    Time frame: 12-week treatment and 1-year follow-up period

    Consumption of alcohol between participants randomized to ZON+ST vs PLO+ST assessed by participant self report (collected 1x weekly from weeks 1-14 and once at weeks 18, 38, and 54).

Secondary outcomes

  1. Change in Biochemically Verified Alcohol Consumption

    Time frame: 12-week treatment and 1-year follow-up period

    Consumption of alcohol between participants randomized to ZON+ST vs PLO+ST assessed by alcohol breathalyzer and biochemical EtG values (collected 3x weekly from weeks 1-6, 1x weekly at weeks 7-14, and once at weeks 18, 38, and 54).

Other outcomes

  1. Adverse Events

    Time frame: 12-week treatment and 1-year follow-up period

    Occurrence of adverse events assessed by SAFETEE (collected 3x weekly at weeks 1-6, 1x weekly at weeks 7-14, and once at weeks 18, 38, and 54).

Sponsors and collaborators

Lead sponsor

Washington State University

Other

Registry information

Official study title

Zonisamide for the Treatment of Alcohol Use Disorder in the Addiction Neuroclinical Assessment Framework

Important dates

Study start
2022
Primary completion
2027
Study completion
2027
First posted
Nov 26, 2021
Registry last updated
Jul 6, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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