The primary objective of this study is to evaluate the abuse potential of intranasal esketamine (112 milligram and 84 mg) compared to racemic intravenous ketamine (0.5 mg/kg) in nondependent, recreational polydrug users of perception-altering drugs.
This is a single-center, single-dose, double-blind, double-dummy, placebo-controlled (participants are randomly assigned to a test treatment or to an identical-appearing treatment that does not contain the test drug), randomized (study medication assigned to participants by chance), crossover study in up to 120 men and women self-identifying as current, recreational, nondependent polydrug users. The study has a Screening Phase (consisting of a Screening Visit and a Qualification Session) and a Treatment Phase. In the Qualification Session participants will be randomized to receive Sequence 1: intravenous placebo and intranasal placebo concurrently (Treatment A) on Day 1 and an intravenous dose (0.5 mg/kg) of racemic ketamine and intranasal placebo concurrently (Treatment B) on Day 2, or the participants will receive Sequence 2: Treatment B on Day 1 and Treatment A on Day 2. In the Treatment Phase eligible participants will be administered 4 treatments: A, B, C (intravenous placebo and intranasal 84 mg esketamine as 3 devices, each with 28 mg esketamine followed by 1 device with placebo) and D (intravenous placebo and intranasal 112 mg of esketamine as 4 devices, each with 28 mg esketamine) in a cross-over manner (1 treatment per period) in Sequence 3, 4, 5, or 6. Periods 1, 2, 3, and 4 will be separated by 7 to 14 days. Primarily the drug abuse potential will be evaluated. Safety of the participants will be monitored throughout the study.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
Enrollment
55
Participants will receive placebo, 40-minute, intravenous infusion on Day 1 of Sequence 1, on Day 2 of Sequence 2, on Day 1 of Period 1 in Sequence 3, 5 and 6, on Day 1 of Period 2 in Sequence 3, 4 and 6, on Day 1 of Period 3 in Sequence 4, 5 and 6, and on Day 1 of Period 4 in Sequence 3, 4 and 5.
Participants will receive placebo, intranasally, on Day 1 or Day 2 in Sequence 1 and 2, on Day 1 of Period 1 in Sequence 3 and 4, on Day 1 of Period 2 in Sequence 4 and 5, on Day 1 of Period 3 in Sequence 3 and 6 and on Day 1 of Period 4 in Sequence 5 and 6.
Participants will receive 0.5 mg/kg racemic ketamine, intranasally, on Day 2 in sequence 1, on Day 1 in sequence 2, on Day 1 of Period 1 in Sequence 4, on Day 1 of Period 2 in Sequence 5, on Day 1 of Period 3 in Sequence 3, and on Day 1 of Period 4 in Sequence 6.
Unnamed facility
Salt Lake City, Utah, United States
Change From Baseline in abuse potential based on Visual Analog Scale
The abuse potential will be assessed based on visual analog scale (VAS). The VAS score will include for Balancing Measures, Positive and Negative effect at the moment, Perceptual / Dissociative Effects and others).
Time frame: up to Day 2 Period 4 in Treatment Phase
Change From Baseline in Clinician-Administered Dissociative States Scale (CADSS) Score
The CADSS is a clinician administered rating scale designed to measure dissociative symptoms. The CADSS comprises 23 subjective items, divided into 3 components: depersonalization, derealization and amnesia. Participant's responses are coded on a 5-point scale (0 = "Not at all" through to 4 = "Extremely). Higher scores indicate worsening
Time frame: up to Day 2 Period 4 in Treatment Phase
Change From Baseline in Columbia Suicide Severity Rating Scale (C-SSRS) Score
The C-SSRS is a clinical interview to assess severity and track suicidal events providing a summary of both suicidal ideation and behavior to identify the level and type of suicidality present.
Time frame: up to Day 2 Period 4 in Treatment Phase
Percentage of Participants with Serious Adverse Events (SAEs) and Adverse Events (AEs)
Time frame: Screening to follow-up visit (11 to 13 days after last dose of study medication)
Maximum Observed Plasma Concentration (Cmax)
Cmax is defined as maximum observed analyte concentration.
Time frame: Predose, 0.17, 0.33, 0.5, 0.67, 1, 1.5, 2, 2.5, 3, 4, 8, 12, and 24 hours post-dose on Day 1
Time to Reach Maximum Observed Plasma Concentration (Tmax)
Tmax is defined as actual sampling time to reach maximum observed analyte concentration.
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Participants will receive 112 mg of Esketamine, intranasally, on Day 1 of Period 1 in Sequence 6, on Day 1 of Period 2 in Sequence 3, on Day 1 of Period 3 in Sequence 5, and on Day 1 of Period 4 in Sequence 4.
Participants will receive 84 mg of Esketamine, intranasally, on Day 1 of Period 1 in Sequence 5, on Day 1 of Period 2 in Sequence 6, on Day 1 of Period 3 in Sequence 4, and on Day 1 of Period 4 in Sequence 3.
Time frame: Predose, 0.17, 0.33, 0.5, 0.67, 1, 1.5, 2, 2.5, 3, 4, 8, 12, and 24 hours post-dose on Day 1
Area Under the Plasma Concentration-Time Curve From Time Zero to Time at Last Observed Quantifiable Concentration (AUClast)
The AUClast is area under the plasma concentration-time curve from time zero to the last quantifiable concentration.
Time frame: Predose, 0.17, 0.33, 0.5, 0.67, 1, 1.5, 2, 2.5, 3, 4, 8, 12, and 24 hours post-dose on Day 1
Area Under the Plasma Concentration-Time Curve From Time Zero to Infinite Time (AUC [0-infinity])
The AUC(0-infinity) is area under the plasma concentration-time curve from time zero to infinite time, calculated as the sum of Area under Curve (AUC) last and C(last)/lambda(z), in which C(last) is the last observed quantifiable concentration
Time frame: Predose, 0.17, 0.33, 0.5, 0.67, 1, 1.5, 2, 2.5, 3, 4, 8, 12, and 24 hours post-dose on Day 1
Area Under the Plasma Concentration-Time Curve From Time Zero to 12 Hours (AUC [0-12])
The AUC (0-12) is the area under the plasma concentration-time curve from time 0 to 12 hours post-dose.
Time frame: Predose, 0.17, 0.33, 0.5, 0.67, 1, 1.5, 2, 2.5, 3, 4, 8, 12, and 24 hours post-dose on Day 1
Elimination Half-Life Period (T1/2)
T1/2 is the time measured for the plasma concentration to decrease by 1 half to its original concentration. It is associated with the terminal rate-constant (lambda\[z\]) of the semi logarithmic drug concentration-time curve, and is calculated as 0.693/lambda(z).
Time frame: Predose, 0.17, 0.33, 0.5, 0.67, 1, 1.5, 2, 2.5, 3, 4, 8, 12, and 24 hours post-dose on Day 1
First-order Rate Constant
First-order rate constant associated with the terminal portion of the curve, determined as the negative slope of the terminal log-linear phase of the drug concentration-time curve.
Time frame: Predose, 0.17, 0.33, 0.5, 0.67, 1, 1.5, 2, 2.5, 3, 4, 8, 12, and 24 hours post-dose on Day 1
Total Body Clearance (CLT/F)
Total body clearance will be calculated as dose/AUC(INF). AUC(INF) will be estimated as AUC(0-T) + Ct/λ z, where λ z is the terminal elimination rate constant and Ct is the last observable concentration
Time frame: Predose, 0.17, 0.33, 0.5, 0.67, 1, 1.5, 2, 2.5, 3, 4, 8, 12, and 24 hours post-dose on Day 1
Volume of Distribution (Vd/F)
The Vd/F is defined as Dose/\[Lambda (z)\*AUC (0-infinity)\].
Time frame: Predose, 0.17, 0.33, 0.5, 0.67, 1, 1.5, 2, 2.5, 3, 4, 8, 12, and 24 hours post-dose on Day 1
Cmax Metabolite to Parent Ratio (MPR Cmax)
Time frame: Predose, 0.17, 0.33, 0.5, 0.67, 1, 1.5, 2, 2.5, 3, 4, 8, 12, and 24 hours post-dose on Day 1
AUC(last) Metabolite to Parent Ratio (MPR AUC[last])
Time frame: Predose, 0.17, 0.33, 0.5, 0.67, 1, 1.5, 2, 2.5, 3, 4, 8, 12, and 24 hours post-dose on Day 1
AUC (infinity) Metabolite to Parent Ratio (MPR AUC [infinity])
Time frame: Predose, 0.17, 0.33, 0.5, 0.67, 1, 1.5, 2, 2.5, 3, 4, 8, 12, and 24 hours post-dose on Day 1
Change from baseline in Nasal Tolerability Questionnaire
Participants need to complete a nasal tolerability questionnaire from Screening to end of the study. The questionnaire will be containing different type symptoms with rating (None, mild, moderate and severe).
Time frame: up to Day 2 in Period 4 of Treatment Phase