A Trial Evaluating the Long-term Safety and Tolerability of Centanafadine Sustained-release Tablets in Adults With Attention-Deficit/Hyperactivity Disorder

Study Overview
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Brief Summary
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This study will evaluate the long-term safety and tolerability of centanafadine sustained-release tablets, administered twice daily in the treatment of adults with attention deficit hyperactivity disorder (ADHD).

Detailed Description
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This open-label study will assess the overall safety and tolerability of 400 mg total daily dose centanafadine sustained-release tablets in subjects, over the course of approximately 52 weeks. This study will accept rollover subjects from both the 405-201-00013 and 405-201-00014 trials. For individuals that did not participate in one of the studies mentioned above, they will be able to enroll if they meet the inclusion criteria as outlined below.

Official Title
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An Open-label, 52-Week, Multicenter Trial Evaluating the Long-term Safety and Tolerability of Centanafadine Sustained-Release Tablets in Adults With Attention-Deficit/Hyperactivity Disorder

Conditions
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Attention Deficit Disorder, Attention Deficit Hyperactivity Disorder

Intervention / Treatment
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* Drug: Centanafadine SR


Participation Criteria
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Eligibility Criteria
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De Novo Subjects [De Novo Enrollment has ended 20Sep2019]. Inclusion Criteria: De novo subjects must meet the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5) criteria for ADHD (including predominantly inattentive presentation, hyperactive presentation, or combined presentation) as confirmed by the Adult ADHD Clinical Diagnostic Scale (ACDS) Version 1.2. To confirm that ADHD is the primary diagnosis, the Mini International Neuropsychiatric Interview (MINI) will be used to identify and exclude other psychiatric conditions which would preclude enrollment. Subjects are 18 to 55 years of age, inclusive, at the time of consent. Subjects have BMI of 18 to 40, inclusive Subjects are willing to discontinue all prohibited psychotropic medications starting from the time of signing the informed consent and up to the 10-day safety follow-up period. Exclusion Criteria: Subject has a DSM-5 diagnosis of Other Specified or Unspecified Attention-Deficit/Hyperactivity Disorder as confirmed by ACDS Version 1.2. Subject has a current comorbid psychiatric disorder that is either controlled with medications prohibited in this trial or is uncontrolled and associated with significant symptoms, including but not limited to: a current major depressive episode (per DSM-5 criteria), current symptoms (past 90 days) meeting the DSM-5 criteria for a diagnosis of generalized anxiety disorder, obsessive compulsive disorder, panic disorder, or posttraumatic stress disorder, as established by the MINI. NOTE: Subjects with mild mood or anxiety symptoms that do not meet criteria for diagnosis, who do not require treatment based on the Investigator's assessment, and do not confound efficacy or safety assessments in the opinion of the examining Investigator, may be included. Subjects that have a positive alcohol test (via breathalyzer or blood), a positive drug screen for cocaine, or other illicit drugs (excluding marijuana). Subjects with a positive drug screen for confirmed prescription medications at baseline will not be permitted to continue participation in Trial 405-201-00015. NOTE: Subjects that tested positive for marijuana may be permitted to be enrolled if they have no evidence of a substance use disorder, and if they agree to refrain from use for the duration of the trial. Allowance for subjects testing positive for marijuana at screening require explicit approval from the medical monitor. Rollover Subjects: Rollover Enrollment has ended 28Aug2020. Inclusion Criteria: Subjects who completed the double-blind treatment period and 7-day follow-up after last dose of investigational medicinal product (IMP) in double-blind trials and who, in the opinion of the investigator, could potentially benefit from centanafadine for ADHD. Exclusion Criteria: Subjects who, during the double-blind phase 3 trial experienced, in the opinion of the investigator, poor tolerability to trial medication or whose safety assessments resulted in new concerns that would suggest the subject may not be appropriate for a 52-week treatment with trial medication. Subjects who have re-initiated any therapy for adult ADHD during the 7-day follow-up period after the final treatment visit of the double-blind phase 3 trial. Subjects that have a positive alcohol test (via breathalyzer or blood), a positive drug screen for cocaine, or other illicit drugs (excluding marijuana). Subjects with a positive drug screen for confirmed prescription medications at baseline will not be permitted to continue participation in Trial 405-201-00015. NOTE: Subjects that test positive for marijuana may not be permitted to rollover into the open label study, and must agree to refrain from use for the duration of the open label trial. Allowance for subjects testing positive for marijuana at time of rollover requires explicit approval from the medical monitor.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 55 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Centanafadine<br>400 mg total daily dose | Drug: Centanafadine SR<br>* 200 mg, BID, oral tablets<br>* Other names: EB-1020;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Adverse Event (AE) Reporting | Frequency and severity of treatment-emergent adverse events (TEAEs) will be assessed to determine safety and tolerability of centanafadine SR tablets | Up to 52 weeks or early termination | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Centanafadine, ADD, ADHD