Study of EMB-001 as a Potential Smoking Cessation Treatment

Efficacy and Safety of Combination EMB-001 as a Potential Smoking Cessation Treatment

EMB-001 is a combination of 2 drugs: the cortisol synthesis inhibitor, metyrapone (Metopirone®), and the benzodiazepine receptor agonist, oxazepam (original trade name Serax®; now marketed as oxazepam (generic) only).

This is an open-label study in up to 50 adult subjects to help smokers abstain from smoking during a 12-week trial period.

Study Overview

• Status: Terminated
• Conditions: Tobacco Use Disorder
• Intervention / Treatment: Drug: EMB-001

Detailed Description

This an exploratory, single-group, open-label study of up to 50 subjects to evaluate the effects on smoking cessation and the safety and tolerability of EBM-001 in smokers.

After obtaining informed consent, adult smokers will be enrolled into the study. There will be an observational period of at least five days to obtain baseline data on use of combustible cigarettes.

Subjects who meet inclusion and exclusion criteria will be treated with EMB-001 (720 mg metyrapone/24 mg oxazepam mg BID, for a total daily dose of 1440 mg metyrapone and 48 mg oxazepam) for a 12-week period, followed by a one week taper.

During the Taper Period, subjects will receive EMB-001 240/8 mg BID.

There will be a follow-up visit for safety assessments at Week 15.

• Study Type: Interventional
• Enrollment (Actual): 16
• Phase: Phase 2; Phase 1

Contacts and Locations

Study Locations

• United States
  • Florida
    • Miami Lakes, Florida, United States, 33014
      • Embera Site
  • North Carolina
    • Raleigh, North Carolina, United States, 27617
      • Rose Research Center

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 17 years to 61 years (Adult, Older Adult)
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

• Has signed the ICF and is able to read and understand the information provided in the ICF.
• Healthy smokers 21 to 65 years of age (inclusive) at screening.
• Smokes an average of at least 10 commercially available cigarettes per day for the last 12 months.
• Has an expired air CO reading of at least 10 ppm at screening.
• Express a desire to quit smoking within the next 30 days at screening.
• Serum Cortisol > 3 µg/dL at screening.
• Willing and able to comply with the requirements of the study.
• Owns a smart phone with text message and data capabilities compatible with necessary surveys.

Exclusion Criteria:

• Is unhealthy or cannot participate in the study for any reason (e.g., medical, psychiatric, and/or social reason) as judged by the Investigator or designated medical staff based on all available assessments from the screening period (e.g., safety laboratory, vital signs, physical examination, ECG, concomitant medications and medical history).
• PHQ-9 score greater than 9, or a score greater than 0 on item #9 ("Thoughts that you would be better off dead, or of hurting yourself in some way") at screening.
• Elevated aspartate aminotransferase (AST) or alanine aminotransferase (ALT) greater than two times the upper limit of normal or history of liver disease.
• Have positive serology test results for human immunodeficiency virus (HIV)-1/HIV-2 antibodies, hepatitis B surface antigen, or hepatitis C antibody.
• High blood pressure (systolic > 150 mmHg or diastolic >95 mmHg) at screening.
• Body mass index (BMI) less than 18.5 kg/m2 or greater than 35.0 kg/m2.
• Coronary heart disease, structural cardiac disease, cardiac dysrhythmias, abnormal ECG, syncope, cardiac chest pain, or history of heart attack or heart failure. For males, QTc > 450 msec. For females QTc > 470 msec (using Fridericia correction formula).
• Has a history of clinically significant drug/alcohol overdose as judged by the Investigator.
• Has alcohol breathalyzer > 0% at screening.
• Has a current DSM-5 opioid or benzodiazepine use disorder of any severity or use of these substances or alcohol in amounts that would increase risk of receiving oxazepam as part of EMB-001 or has received psychotherapy or behavioral treatments potentially impacting symptoms of depression, anxiety, or nicotine withdrawal within 30 days of screening, or during the study.
• Has history of mental illness that, in the opinion of the investigator, may interfere with subject safety or data integrity.
• Taking antidepressants, CNS or psychoactive medications (e.g., antipsychotics, benzodiazepines, hypnotics) or medications that prolong QTc within the last 30 days of screen or during study.

• Use of any of these products in the past 30 days:

  1. Illegal drugs (or if the urine drug screen is positive for cocaine, THC, amphetamines, methamphetamines, MDMA (Ecstasy), phencyclidine, benzodiazepines, barbiturates, or opiates at screening);
  2. Experimental (investigational) drugs or biologic;
  3. Chronic opiate use;
  4. Biotin products (Vitamin B7 or B8, Vitamin H, or coenzyme R).

• Use of glucocorticoids including:

  1. Oral glucocorticoids within 90 days of screen or during study;
  2. Inhaled glucocorticoids within 90 days of screen or during study;
  3. Topical glucocorticoids within 7 days of screen or during the study (except when applied to a small body surface area);
  4. Joint injection within 90 days of screening or during the study.
• Donation of any blood components within 84 days of screening or during the study or loss of blood ≥ 400 mL within 84 days of screen.
• Use of smokeless tobacco (chewing tobacco, snuff), cigars (except for cigarillos), pipes, hookah, e-cigarettes, nicotine replacement therapy or other smoking cessation treatments within 14 days of enrollment.
• Pregnant or nursing (by self-report) or has a positive pregnancy test.
• Woman of Childbearing Potential
• Known hypersensitivity to or intolerance of oxazepam, metyrapone, or any benzodiazepine, or severe hypersensitivity reaction (e.g., angioedema) to any drug.
• Treatment with an investigational drug or biologic within the 30 days preceding the first dose of study medication or plans to take another investigational drug or biologic within 30 days of study completion (including the follow-up visit).

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: EMB-001 Active; 720 mg metyrapone/24 mg oxazepam mg BID, for a total daily dose of 1440 mg metyrapone and 48 mg oxazepam	Drug: EMB-001; Combination product metyrapone and oxazepam

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Smoking Abstinence	The primary abstinence outcome will be smoking abstinence	Weeks 9-12

Collaborators and Investigators

• Sponsor: Embera NeuroTherapeutics, Inc.
• Collaborators: Rose Research Center, LLC; Segal Trials; Foundation for a Smoke Free World INC
• Investigators: Study Chair: Bruce McCarthy, MD, Embera NeuroTherapeutics, Inc.

Publications and helpful links

General Publications

• Kablinger AS, Lindner MA, Casso S, Hefti F, DeMuth G, Fox BS, McNair LA, McCarthy BG, Goeders NE. Effects of the combination of metyrapone and oxazepam on cocaine craving and cocaine taking: a double-blind, randomized, placebo-controlled pilot study. J Psychopharmacol. 2012 Jul;26(7):973-81. doi: 10.1177/0269881111430745. Epub 2012 Jan 11.

Study record dates

Study Major Dates

• Study Start (Actual): June 10, 2021
• Primary Completion (Actual): April 1, 2023
• Study Completion (Actual): May 1, 2023

Study Registration Dates

• First Submitted: June 14, 2021
• First Submitted That Met QC Criteria: June 14, 2021
• First Posted (Actual): June 22, 2021

Study Record Updates

• Last Update Posted (Actual): August 9, 2023
• Last Update Submitted That Met QC Criteria: August 7, 2023
• Last Verified: August 1, 2023

More Information

Terms related to this study

• Keywords: smoking; smoking cessation; tobacco use
• Additional Relevant MeSH Terms: Mental Disorders; Chemically-Induced Disorders; Substance-Related Disorders; Tobacco Use Disorder
• Other Study ID Numbers: ERL-T002

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: Yes
• Studies a U.S. FDA-regulated device product: No