A Study to Evaluate the Abuse Potential of EB-1020 Immediate-Release in Healthy Recreational Stimulant Users

Study Overview
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Brief Summary
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This single-center study will be a single-dose, randomized, double-blind, placebo- and active-controlled crossover study with a single inpatient treatment visit. The abuse potential of single oral doses of EB-1020 IR (400 mg, 800 mg) will be compared with that of placebo and d-amphetamine (20 mg, 40 mg; active control) in healthy recreational stimulant users. Subjects will participate in a medical Screening visit (Visit 1), one 4-day inpatient Qualification Phase (Visit 2), one 11-day inpatient Treatment Phase (Visit 3), and a safety Follow-up visit (Visit 4).

Detailed Description
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Subjects will be randomized to 1 of 10 treatment sequences according to a two 5 x 5 William squares design. To maintain blinding, subjects will be required to ingest eight capsules with approximately 240 mL water on each study drug administration day. Serial pharmacodynamic (PD) evaluations will be conducted up to 24 hours after each study drug administration. Pharmacokinetic (PK) samples will be obtained to confirm exposure to EB-1020. Safety monitoring will include recording of adverse events (AEs), regular assessments of vital signs measurements, 12-lead electrocardiogram (ECG) findings, and continuous telemetry monitoring for at least 3 hours after study drug administration.

Conditions
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Healthy Volunteers, Drug Users

Intervention / Treatment
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* Drug: EB-1020 400 mg
* Drug: EB-1020 800 mg
* Drug: lisdexamfetamine 150 mg
* Drug: d-amphetamine 40 mg
* Drug: Placebo


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Subjects must be healthy male nondependent recreational drug users Subjects must be 18 to 55 years old, inclusive. Subjects must have greater than or equal to 10 lifetime nontherapeutic experiences with central nervous system (CNS) stimulants (e.g., amphetamines, cocaine, methylphenidate), greater than or equal to 1 nontherapeutic use of prescription stimulants within the 12 months prior to Screening, and greater than or equal to 1 nontherapeutic use of a CNS stimulant within the 12 weeks prior to Screening. Exclusion Criteria: Subjects that are deemed medically unsuitable or unlikely to comply with the study protocol for any reason. Subjects who do not pass Qualification Phase criteria to be eligible for the Treatment Phase.

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

Sexes Eligible for Study
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Male

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: EB-1020 400 mg<br>EB-1020 400 mg, administered as four 100-mg IR capsules and 4 matching placebo capsules | Drug: EB-1020 400 mg<br>* 4 x EB-1020 100-mg capsules, and 4 matching placebo capsules<br>|
| Experimental: EB-1020 800 mg<br>EB-1020 800 mg, administered as eight 100-mg IR capsules | Drug: EB-1020 800 mg<br>* 8 x EB-1020 100-mg capsules<br>|
| Active Comparator: lisdexamfetamine 150 mg<br>lisdexamfetamine 150 mg, administered as 3 capsules, each containing 1 lisdexamfetamine 50-mg capsule, and 5 matching placebo capsules | Drug: lisdexamfetamine 150 mg<br>* 3 x capsules, each containing 1 lisdexamfetamine 50-mg capsule, and 5 x matching placebo capsules<br>|
| Active Comparator: d-amphetamine 40 mg<br>d-amphetamine 40 mg, administered as 4 capsules, each containing two 5-mg d-amphetamine tablets and 4 matching placebo capsules | Drug: d-amphetamine 40 mg<br>* 4 x capsules, each containing 2 d-amphetamine 5-mg tablets, and 4 x matching placebo capsules<br>|
| Placebo Comparator: Placebo<br>Placebo, administered as 8 matching placebo capsules | Drug: Placebo<br>* 8 x matching placebo capsules<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Maximum effect (Emax) on Drug Liking visual analog scale (VAS) | Drug liking VAS is one of the measures of balance of effects that assesses the degree that a participant likes a drug effect at the time the question is being asked (that is, at the moment). It is scored using a 100 millimeter (mm) bipolar visual analogue scale (VAS) anchored in the center with a neutral anchor of neither like nor dislike (score of 50 mm), on the left with strong disliking (score of 0 mm) and on the right with strong liking (score of 100 mm). | within 24 hours post-dose | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Drug Liking VAS (minimum effect [Emin] and time-averaged area under the effect curve to 12 hours after study drug administration [TA_AUE]) | Drug liking VAS is one of the measures of balance of effects that assesses the degree that a participant likes a drug effect at the time the question is being asked (that is, at the moment). It is scored using a 100 millimeter (mm) bipolar visual analogue scale (VAS) anchored in the center with a neutral anchor of neither like nor dislike (score of 50 mm), on the left with strong disliking (score of 0 mm) and on the right with strong liking (score of 100 mm). | within 24 hours post-dose | 
| Overall Drug Liking VAS (Emax/Emin) | Overall drug liking VAS is one of the measures of balance of effects that assesses the participant's global perception of drug liking (that is, effects over the whole course of the drug experience including any carryover effects). A 100 mm bipolar VAS is used to assess response based on a score ranging from 0 mm to 100 mm (0 mm = strong disliking, 50 mm= neither like nor dislike, and 100 mm= strong liking). | within 24 hours post-dose | 
| Take Drug Again VAS (Emax) | Take drug again VAS is one of the measures of balance of effects. It is a subjective assessment of the degree to which a participant would desire to take the drug again if given the opportunity. It is presented on a 100 mm bipolar VAS with score ranging from 0 mm to 100 mm (score of 0 mm = definitely not, 50 mm = do not care, and 100 mm = definitely so). | within 24 hours post-dose | 
| High VAS (Emax and TA_AUE) | High VAS is one of the measures of positive effects that assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'none' (score of 0 mm= definitely not) to 'extremely' (score of 100 = definitely so). | within 24 hours post-dose | 
| Good Effects VAS (Emax and TA_AUE) | Good drug effects VAS is one of the measures of positive effects that assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'none' (score of 0 mm= definitely not) to 'extremely' (score of 100 mm= definitely so). | within 24 hours post-dose | 
| Bad Effects VAS (Emax and TA_AUE) | Bad effects VAS is one of the measures of negative effects that assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'none' (score of 0 mm= definitely not) to 'extremely' (score of 100 mm= definitely so). | within 24 hours post-dose | 
| Nausea VAS (Emax and TA_AUE) | Nausea VAS assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'none' (score of 0 mm) to 'extremely' (score of 100 mm). | within 24 hours post-dose | 
| ARCI-A scale (Emax and TA_AUE) | ARCI-A is measure of other stimulant effects. It is a set of 13 questions in which each question contributes to total score. Participants select 'False' / 'True' for response. One point given for each response that agrees with scoring direction, true items receive score of 1 if answer 'True', false items receive score of 1 if answer 'False'. No points if answer is opposite to scoring direction. Score range: 0 to 13, higher score indicated higher other subjective effects. | within 24 hours post-dose | 
| ARCI-BG scale (Emax and TA_AUE) | ARCI-BG is measure of other subjective effects. It is a set of 13 questions in which each question contributes to total score. Participants select 'False' / 'True' for response. One point given for each response that agrees with scoring direction, true items receive score of 1 if answer 'True', false items receive score of 1 if answer 'False'. No points if answer is opposite to scoring direction. Score range: 0 to 13, higher score indicated higher other subjective effects. | within 24 hours post-dose | 
| Alertness/Drowsiness VAS (Emax and TA_AUE) | Alertness/Drowsiness VAS is one of the measures of sedative effects. It is scored using a 100 mm bipolar VAS anchored in the center with a neutral anchor of neither drowsy nor alert (score of 50 mm), on the left with very drowsy (score of 0 mm) and on the right with very alert (score of 100 mm). | within 24 hours post-dose | 
| Agitation/Relaxation VAS (Emax and TA_AUE) | Agitation/Relaxation VAS assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'none' (score of 0 mm) to 'extremely' (score of 100 mm). | within 24 hours post-dose | 
| Any Effects VAS (Emax and TA_AUE) | Any drug effects VAS is one of the measures of other subjective effects. It assesses the effect experienced by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'none' (score of 0 mm= definitely not) to 'extremely' (score of 100 mm= definitely so). | within 24 hours post-dose | 
| Drug Similarity VAS (score at 12 hours after study drug administration) | Drug similarity VAS is one of the measures of other subjective effects. It assesses the similarity of the drug recently received by the participant on a 100 mm unipolar VAS, where responses are unidirectional and range from a response of 'none' (score of 0 mm= not at all similar) to 'extremely' (score of 100 mm= very similar). Recently received drugs were compared with placebo, benzodiazepines, codeine/morphine, Tetrahydrocannabinol (THC), pseudoephedrine. | within 24 hours post-dose | 
| Safety and tolerability of EB-1020 as assessed by AEs |  | Up to 6 weeks | 
| Safety and tolerability of EB-1020 by laboratory assessments |  | Up to 6 weeks | 
| Safety and tolerability of EB-1020 as assessed by 12-lead ECGs |  | Up to 6 weeks | 
| Safety and tolerability of EB-1020 as assessed by vital signs |  | Up to 6 weeks | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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abuse liability, recreational drug user, stimulant, d-amphetamine, ADHD