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Medications Development for the Treatment of Cannabis Related Disorders (MTC)

31 maj 2012 uppdaterad av: University of Virginia
The primary objective of this application is to test the neurobehavioral mechanisms and effects of aprepitant as a new cessation agent for cannabis, tobacco or both.

Studieöversikt

Status

Avslutad

Betingelser

Intervention / Behandling

Detaljerad beskrivning

Stress (emotional, physical, social) facilitates drug seeking behavior through the activation of the HPA axis, autonomic nervous system, and brain DA systems. Furthermore, alterations within several neuropeptide systems (CRF, Substance P, and others) also contribute to the role of stress in addiction. Central to this project is that anxiety and stress responses are modulated by substance P and its preferred target, the NK1 receptor. Therefore the aim of this pilot clinical trial is to determine the safety and efficacy of aprepitant (a neurokinin 1 (NK1) receptor antagonist). We hypothesize that the NK1 receptor antagonist, aprepitant, will be safe, tolerable and efficacious at reducing the withdrawal symptoms, cue craving, and reinforcement value for both cannabis and tobacco resulting from the cessation of either or both drugs. We will assess this hypothesis in the context of a carefully controlled human laboratory study in which subjects (N=72) will be randomized in a 3 x 2 factorial design to one of 3 behavioral conditions; a) withdrawn from both substances, b) withdrawn from tobacco only, or c) withdrawn from cannabis only, and to receive one of 2 medication dose conditions: placebo or aprepitant (160 mg/day). Medication will be administered for 5 days, followed by a cue challenge, choice procedure, and then a consequence (i.e., oral cannabis or a cigarette or money) also on day 5.

Studietyp

Interventionell

Inskrivning (Faktisk)

63

Fas

  • Fas 1

Kontakter och platser

Det här avsnittet innehåller kontaktuppgifter för dem som genomför studien och information om var denna studie genomförs.

Studieorter

  • Förenta staterna
    • Virginia
      • Charlottesville, Virginia, Förenta staterna, 22903
        • Clinical Pharmacological Research Unit (CPRU), University of Virginia School of Medicine
      • Charlottesville, Virginia, Förenta staterna, 22908
        • University of Virginia Center for Addiction Education and Treatment (UVA CARE)

Deltagandekriterier

Forskare letar efter personer som passar en viss beskrivning, så kallade behörighetskriterier. Några exempel på dessa kriterier är en persons allmänna hälsotillstånd eller tidigare behandlingar.

Urvalskriterier

Åldrar som är berättigade till studier

18 år till 45 år (Vuxen)

Tar emot friska volontärer

Ja

Kön som är behöriga för studier

Allt

Beskrivning

Inclusion Criteria:

  • Must meet DSM-IV/ICD-10 criteria for cannabis abuse or dependence
  • Must be non-treatment seeking individuals
  • Participant does not meet DSM-IV criteria for any current (i.e., criteria met at any point in the past 30 days) dependence on a substance other than alcohol, nicotine, caffeine, or marijuana or physiological dependence on alcohol requiring medical detoxification.
  • No subjects who have trouble reading the English language or visual or hearing problems that may interfere with the collection of data
  • Not currently taking other medications (with the exception of oral contraceptives) that would preclude safe participation in this study
  • Must test negative for pregnancy prior to inclusion
  • females using birth control pills must agree to use a condom during intercourse for 1 month after participation in study because the study medication will decrease the effectiveness of the birth control pill rendering it ineffective
  • Should be in general good health
  • No evidence of recent use of other illicit drugs on a urine toxicity screen prior to admission

Exclusion Criteria:

  • Major current (within last 90 days) Axis I psychopathology (e.g., major depressive disorder, bipolar disorder, schizophrenia)
  • Presence of significant medical illness (e.g., diabetes, cardiovascular disease, hypertension, cancer, epilepsy, kidney disease)
  • Current, repeated illicit drug use (other than marijuana)
  • Subject is breastfeeding or pregnant
  • Concurrent therapy with drugs known to inhibit CYP3A4 activity
  • Request for drug treatment
  • Current parole or probation
  • Recent history of significant violent or suicide behavior
  • Allergic to sesame oil

Studieplan

Det här avsnittet ger detaljer om studieplanen, inklusive hur studien är utformad och vad studien mäter.

Hur är studien utformad?

Designdetaljer

  • Primärt syfte: Grundläggande vetenskap
  • Tilldelning: Randomiserad
  • Interventionsmodell: Enskild gruppuppgift
  • Maskning: Fyrdubbla

Vapen och interventioner

Deltagargrupp / Arm
Intervention / Behandling
Experimentell: Behavioral Condition 1
Nicotine patch (21 mg) plus placebo oral cannabis (0 mg; 3 times a day on days 2-4, given once on day 5)
Läkemedel: Placebo Aprepitant
Placebo Aprepitant 0 mg once daily for 5 days
Läkemedel: Active Aprepitant
Active Aprepitant 160 mg once daily for 5 days
Experimentell: Behavioral Condition 2
Placebo nicotine patch (0 mg) plus oral cannabis (10 mg, 3 times each day, days 2-4, day 5 given once)
Läkemedel: Placebo Aprepitant
Placebo Aprepitant 0 mg once daily for 5 days
Läkemedel: Active Aprepitant
Active Aprepitant 160 mg once daily for 5 days
Experimentell: Behavioral Condition 3
Placebo nicotine patch (0 mg) plus placebo oral cannabis (0 mg, 3 times each day days 2-4, day 5 given once)
Läkemedel: Placebo Aprepitant
Placebo Aprepitant 0 mg once daily for 5 days
Läkemedel: Active Aprepitant
Active Aprepitant 160 mg once daily for 5 days

Vad mäter studien?

Primära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
withdrawal symptom severity, measured on a 0 (not at all) to 3 (severe) scale
Tidsram: collected on each study day
Subjective experience of withdrawal symptoms for cannabis, tobacco, and both (eg: Irritability, Sleep difficulty, Chills, Nervousness)
collected on each study day
"craving" measured using the Marijuana craving questionaire and the tobacco craving questionaire
Tidsram: collected on each study day
Subjective measures of craving for cannabis, tobacco, and both Questionaires are anchored with strongly disagree to strongly agree (1-7)
collected on each study day
reinforcing effects, as measured using the Multiple Choice Questionaire
Tidsram: collected each day of study
Reinforcement value of cannabis and tobacco as measured by preference for money over the administration of either drug; questionaire has 70 questions and money value vs. drug ranges from 25 cents to 25 dollars 1-70.
collected each day of study

Sekundära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
sleep quality
Tidsram: collected on each study day
A VAS sleep questionnaire will be used each morning to assess daily sleep quality.
collected on each study day
Neurocognitive Function
Tidsram: collected on days 1-4 of the study
The purpose of examining the neurocognitive function of our participants on days 1-4 is to examine the safety of the co-administration of aprepitant at 160 mg/day with oral THC (dronabinol 10 mg) on brain function. Tasks used are the DSST - The Digit Symbol Substitution Test measures the learning of integrating visual and motor skills, and the SRTT- The Simple reaction Time Task is a well validated computerized test for assessing the effects of psychoactive drugs on performance.
collected on days 1-4 of the study
Number of Participants with Adverse Events as a Measure of Safety and Tolerability
Tidsram: each day of study
Blood pressure, pulse, and a Systematic Assessment For Treatment Emergent Events (SAFTEE) are collected daily. Electrocardiograms (EKGs) are collected at baseline and discharge.
each day of study

Samarbetspartners och utredare

Det är här du hittar personer och organisationer som är involverade i denna studie.

Sponsor

University of Virginia

Samarbetspartners

National Institute on Drug Abuse (NIDA)

Utredare

  • Huvudutredare: Heather M Haughey, Ph.D., University of Virginia School of Medicine, Dept. Psychiatry and Neurobehavioral Sciences

Publikationer och användbara länkar

Den som ansvarar för att lägga in information om studien tillhandahåller frivilligt dessa publikationer. Dessa kan handla om allt som har med studien att göra.

Allmänna publikationer

Studieavstämningsdatum

Dessa datum spårar framstegen för inlämningar av studieposter och sammanfattande resultat till ClinicalTrials.gov. Studieposter och rapporterade resultat granskas av National Library of Medicine (NLM) för att säkerställa att de uppfyller specifika kvalitetskontrollstandarder innan de publiceras på den offentliga webbplatsen.

Studera stora datum

Studiestart

1 augusti 2009

Primärt slutförande (Faktisk)

1 januari 2012

Avslutad studie (Faktisk)

1 april 2012

Studieregistreringsdatum

Först inskickad

14 september 2010

Först inskickad som uppfyllde QC-kriterierna

15 september 2010

Första postat (Uppskatta)

17 september 2010

Uppdateringar av studier

Senaste uppdatering publicerad (Uppskatta)

1 juni 2012

Senaste inskickade uppdateringen som uppfyllde QC-kriterierna

31 maj 2012

Senast verifierad

1 maj 2012

Mer information

Termer relaterade till denna studie

Nyckelord

Ytterligare relevanta MeSH-villkor

Andra studie-ID-nummer

  • 14392
  • R01DA027131 (U.S.S. NIH-anslag/kontrakt)

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