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

31. mai 2012 oppdatert 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.

Studieoversikt

Status

Fullført

Forhold

Intervensjon / Behandling

Detaljert beskrivelse

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study in which subjects (N=72) will be randomized in a 3 x 2 factorial design to one of 3 behavioral conditions; a) withdrawn from both substances, b) withdrawn from tobacco only, or c) withdrawn from cannabis only, and to receive one of 2 medication dose conditions: placebo or aprepitant (160 mg/day).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.

Studietype

Intervensjonell

Registrering (Faktiske)

63

Fase

  • Fase 1

Kontakter og plasseringer

Denne delen inneholder kontaktinformasjon for de som utfører studien, og informasjon om hvor denne studien blir utført.

Studiesteder

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

Deltakelseskriterier

Forskere ser etter personer som passer til en bestemt beskrivelse, kalt kvalifikasjonskriterier. Noen eksempler på disse kriteriene er en persons generelle helsetilstand eller tidligere behandlinger.

Kvalifikasjonskriterier

Alder som er kvalifisert for studier

18 år til 45 år (Voksen)

Tar imot friske frivillige

Ja

Kjønn som er kvalifisert for studier

Alle

Beskrivelse

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

Denne delen gir detaljer om studieplanen, inkludert hvordan studien er utformet og hva studien måler.

Hvordan er studiet utformet?

Designdetaljer

  • Primært formål: Grunnvitenskap
  • Tildeling: Randomisert
  • Intervensjonsmodell: Enkeltgruppeoppdrag
  • Masking: Firemannsrom

Våpen og intervensjoner

Deltakergruppe / Arm
Intervensjon / Behandling
Eksperimentell: 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)
Legemiddel: Placebo Aprepitant
Placebo Aprepitant 0 mg once daily for 5 days
Legemiddel: Active Aprepitant
Active Aprepitant 160 mg once daily for 5 days
Eksperimentell: Behavioral Condition 2
Placebo nicotine patch (0 mg) plus oral cannabis (10 mg, 3 times each day, days 2-4, day 5 given once)
Legemiddel: Placebo Aprepitant
Placebo Aprepitant 0 mg once daily for 5 days
Legemiddel: Active Aprepitant
Active Aprepitant 160 mg once daily for 5 days
Eksperimentell: 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)
Legemiddel: Placebo Aprepitant
Placebo Aprepitant 0 mg once daily for 5 days
Legemiddel: Active Aprepitant
Active Aprepitant 160 mg once daily for 5 days

Hva måler studien?

Primære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
withdrawal symptom severity, measured on a 0 (not at all) to 3 (severe) scale
Tidsramme: 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
Tidsramme: 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
Tidsramme: 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

Sekundære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
sleep quality
Tidsramme: 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
Tidsramme: 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
Tidsramme: 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

Samarbeidspartnere og etterforskere

Det er her du vil finne personer og organisasjoner som er involvert i denne studien.

Sponsor

University of Virginia

Samarbeidspartnere

National Institute on Drug Abuse (NIDA)

Etterforskere

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

Publikasjoner og nyttige lenker

Den som er ansvarlig for å legge inn informasjon om studien leverer frivillig disse publikasjonene. Disse kan handle om alt relatert til studiet.

Generelle publikasjoner

Studierekorddatoer

Disse datoene sporer fremdriften for innsending av studieposter og sammendragsresultater til ClinicalTrials.gov. Studieposter og rapporterte resultater gjennomgås av National Library of Medicine (NLM) for å sikre at de oppfyller spesifikke kvalitetskontrollstandarder før de legges ut på det offentlige nettstedet.

Studer hoveddatoer

Studiestart

1. august 2009

Primær fullføring (Faktiske)

1. januar 2012

Studiet fullført (Faktiske)

1. april 2012

Datoer for studieregistrering

Først innsendt

14. september 2010

Først innsendt som oppfylte QC-kriteriene

15. september 2010

Først lagt ut (Anslag)

17. september 2010

Oppdateringer av studieposter

Sist oppdatering lagt ut (Anslag)

1. juni 2012

Siste oppdatering sendt inn som oppfylte QC-kriteriene

31. mai 2012

Sist bekreftet

1. mai 2012

Mer informasjon

Begreper knyttet til denne studien

Nøkkelord

Ytterligere relevante MeSH-vilkår

Andre studie-ID-numre

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

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