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Tetrahydrocannabinol (THC) and Sleep

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Know the risks and potential benefits of clinical studies and talk to your health care provider before participating. Read our disclaimer for details. Identifier: NCT03560934
Recruitment Status : Recruiting
First Posted : June 18, 2018
Last Update Posted : February 6, 2019
Information provided by (Responsible Party):
Steven A. Shea, Oregon Health and Science University

Brief Summary:
The investigators will test the effects of 20-30mg dronabinol (oral THC) on sleep in non-frequent and frequent cannabis users.

Condition or disease Intervention/treatment Phase
Sleep THC Marijuana Cannabis Drug: Dronabinol Early Phase 1

Detailed Description:
The investigators plan to test the effects of 20-30 mg dronabinol (oral THC) on subjective (surveys) and objective (polysomnographically scored (PSG)) sleep in non-frequent and frequent cannabis users following an acclimation and baseline night of sleep. The mornings after baseline sleep and dronabinol administration, cognitive performance will also be measured and participants may also perform morning typical behaviors such as change in posture (getting out of bed/tilt test) and mild intensity physical activity. This pilot study is in healthy young adults without a history of chronic disease.

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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 14 participants
Allocation: Non-Randomized
Intervention Model: Parallel Assignment
Intervention Model Description: Participants are initially categorized as non-frequent or frequent cannabis users based on their cannabis use behavior and then receive the same treatment of 20-30mg dronabinol upon participation in the study.
Masking: None (Open Label)
Primary Purpose: Basic Science
Official Title: Effect of Tetrahydrocannabinol (THC) on Sleep in Humans
Actual Study Start Date : September 1, 2018
Estimated Primary Completion Date : February 1, 2020
Estimated Study Completion Date : February 1, 2022

Resource links provided by the National Library of Medicine

Drug Information available for: Dronabinol

Arm Intervention/treatment
Experimental: Frequent Cannabis Users

Subjects categorized as frequent cannabis users (>3x/week for 3 months) will receive a single dose of 20-30mg dronabinol on the third night of their stay in the clinical laboratory (following an acclimation and baseline night), one hour prior to bedtime and five minutes after completion of a study snack.

Dronabinol is an orally active, synthetic THC currently indicated for weight loss in patients with acquired immune deficiency syndrome (AIDS) or anorexia and for nausea and vomiting associated with cancer. Dronabinol is nearly absorbed (90%-95%) after a single oral dose of the capsule formulation with 10-20% of the administered dose researching the systemic circulation due to extensive first-pass hepatic metabolism and high lipid solubility. The onset of action is ~30 to 60 minutes with peak effects from 2-4-h following dose (Fig. 2) (34). The 20-30 mg of dronabinol will be administered by OHSU's research pharmacy services.

Drug: Dronabinol
Single dose oral administration of 20-30mg dronabinol prior to night 3 sleep in the clinical laboratory.

Experimental: Non Cannabis Users
Non-cannabis users (who have never used cannabis or not more than 10 times in their lifetime) will undergo the same single dose administration of 20-30mg dronabinol as the frequent cannabis user arm, under the identical study procedure.
Drug: Dronabinol
Single dose oral administration of 20-30mg dronabinol prior to night 3 sleep in the clinical laboratory.

Primary Outcome Measures :
  1. Sleep Stages [ Time Frame: Over the 3-night laboratory stay ]
    Sleep electroencephalogram (EEG) will be measured and scored across the baseline and experimental night sleep periods for timing and sleep stages.

  2. Psychomotor Vigilance [ Time Frame: Over the 3-night laboratory stay ]
    Psychomotor vigilance will be measured shortly after awakening each test morning.

  3. Blood Pressure [ Time Frame: Over the 3-night laboratory stay ]
    Blood pressure (BP) will be measured every 30 min during wake and every 15 minutes during sleep. Beat-by-beat (BP) will be measured during sleep using a non-invasive device employing the volume-clamp method with hydrostatic correction (BMeye Nexfin or AD Instruments NIBP). Additionally an automated calibrated sphygmomanometer will be used to record sporadic BP at intervals during an exercise challenge.

  4. Heart Rate [ Time Frame: Over the 3-night laboratory stay ]
    For the duration of the study, 2 channels of EKG are recorded (RA-V6) and stored at a sample frequency of 256 Hz. This software will be used for peak detection (R-wave detection and subsequent heart rate variability (HRV) analysis to estimate cardiac vagal tone).

  5. Endothelial Function [ Time Frame: Over the 3-night laboratory stay ]
    Endothelial Function will be measured as Flow Mediated Dilation in the brachial artery 10 minutes after each awakening and 20 minutes before each sleep period.

  6. Sleep Cardiac Data [ Time Frame: Over the 3-night laboratory stay ]
    Cardiac Data will be measured by a 12-lead ECG holter device across the baseline and experimental night sleep periods.

  7. Sleep Beat-By-Beat Blood Pressure [ Time Frame: Over the 3-night laboratory stay ]
    Continuous beat-by-beat blood pressure will be measured over the baseline and experimental night's sleep periods using a non-invasive continuous blood pressure monitoring device worn on the participant's finger

  8. Buschke Selective Reminding Test (SRT) [ Time Frame: Over the 3-night laboratory stay ]
    Working memory will be measured shortly after awakening each test morning using the Buschke Selective Reminding Test (SRT).

  9. Victoria Stroop Test [ Time Frame: Over the 3-night laboratory stay ]
    The victoria stroop test will be measured shortly after awakening each test morning.

  10. Necker Cube Test [ Time Frame: Over the 3-night laboratory stay ]
    Selective attention will be measured shortly after awakening each test morning using the necker cube test

Secondary Outcome Measures :
  1. Subjective sleepiness/alertness [ Time Frame: Over the 3-night laboratory stay ]
    Subjective sleepiness and alertness will be measured regularly (~1/h) across wake periods during the study protocol using the Stanford Sleepiness Scale. The scale measures subjective sleepiness on a 1-5 point Likert scale with 5 indicating the highest degree of sleepiness and 1 indicating the lowest degree of sleepiness.

  2. Caloric Intake [ Time Frame: 2-4 weeks prior to multi-night laboratory stay ]
    Participants will use a meal logging app to log all meals and beverages consumed for caloric/nutritional content and timing for a period prior to coming into the clinical laboratory.

Information from the National Library of Medicine

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Ages Eligible for Study:   21 Years to 34 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Frequent Cannabis Use (>3x/week for the prior 3 months) or
  • No Cannabis Use (Less than 10x ever)

Exclusion Criteria:

  • Sleep Apnea
  • Pregnancy
  • Diabetes
  • Cardiovascular disease
  • Chronic Pain
  • History of seizures
  • Severe Hepatic impairment
  • Conditions associated with clinically relevant cognitive impairment
  • Symptoms of acute or active illness (e.g., fever and leukocytosis)
  • Evidence of psychopathology on the Beck Depression Index II (BDI-II or in a structured clinical interview with a physician
  • History of severe psychiatric illnesses (including such as alcoholism, drug dependency including a cannabis use disorder score ≥12 on the Cannabis Use Disorders Identification Test (CUDIT) (28) or >1 withdrawal symptom on the Marijuana Withdrawal Checklist (MWC (29)) , major depression, manic depressive illness, schizophrenic disorders, panic disorder, generalized anxiety disorder, post-traumatic stress disorder, agoraphobia, claustrophobia, paranoid personality disorder, schizoid personality disorder, schizotypal personality disorder, borderline personality disorder, and antisocial personality disorder.)
  • History of having been treated with antidepressants, neuroleptic medications, or tranquilizers.
  • Volunteers must be drug-free (including caffeine, nicotine, alcohol and herbal medications) for the duration of the screening and study period (with the exception of THC), with no history of drug (e.g. cocaine, opioids, amphetamine, methamphetamine, PCP, benzodiazepines, barbiturates, methadone, MDMA); or alcohol dependency.
  • Current Nicotine use ( or history of more than 5 'pack years' of smoking)
  • Current use of prescription or over the counter medications
  • History of shift work in the last 6 months
  • Travel across >2 time zones during the month prior to the study
  • Habitual bedtime after 1am or waketime before 5am

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT03560934

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Contact: Nicole Bowles, PhD 5034942541
Contact: Leanna M Williams, BS 5034941317

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United States, Oregon
Oregon Health & Science University Recruiting
Portland, Oregon, United States, 97239
Contact: Nicole P Bowles, PhD    503-494-2541   
Sponsors and Collaborators
Oregon Health and Science University
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Principal Investigator: Steven A Shea, PhD Oregon Health and Science University

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Responsible Party: Steven A. Shea, Director of Oregon Institute of Occupational Health Sciences, Oregon Health and Science University Identifier: NCT03560934     History of Changes
Other Study ID Numbers: IRB00018052
First Posted: June 18, 2018    Key Record Dates
Last Update Posted: February 6, 2019
Last Verified: February 2019
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No

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Studies a U.S. FDA-regulated Drug Product: Yes
Studies a U.S. FDA-regulated Device Product: No
Product Manufactured in and Exported from the U.S.: Yes

Additional relevant MeSH terms:
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Physiological Effects of Drugs
Psychotropic Drugs
Analgesics, Non-Narcotic
Sensory System Agents
Peripheral Nervous System Agents
Cannabinoid Receptor Agonists
Cannabinoid Receptor Modulators
Neurotransmitter Agents
Molecular Mechanisms of Pharmacological Action
Hormones, Hormone Substitutes, and Hormone Antagonists