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Phase 1 N=8 Randomized Triple-blind Basic Science

Validation of the Drug Impaired Driving Scenario (DIDS) on the CRCDS-miniSim

Driving Behavior · Driving Under the Influence

Enrolled (actual)
8
Serious AEs
0.0%
Results posted
Jul 2023
Primary outcome: Primary: Standard Deviation of Lateral Position (SDLP) — 25.490; 37.849; 33.086 cm

Study Design & Population

Study type
Interventional
Phase
Phase 1
Interventions
Placebo (Lactose) Capsule (Drug); 0.75 mg Alprazolam Capsule (Drug); Cannabis (6.18% THC / <0.025% CBD) (Drug); Cannabis (0%/ THC / 0% CBD) (Drug)
Age
Adult · 19+ yrs
Sex
All
Sponsor
Timothy L. Brown
Primary completion
Aug 2021

Outcome Measures

OutcomeResultp-value
PRIMARY
Standard Deviation of Lateral Position (SDLP)
25.490; 37.849; 33.086
SECONDARY
Lane Exceedences
5.750; 36.500; 29.875

Summary

Subjects will participate in a 4-visit study protocol at the National Advanced Driving Simulator, part of the University of Iowa, in which they will be asked to complete assorted questionnaires, computerized cognitive tasks, and a simulator drive. Subjects will be administered 0.75 mg alprazolam (Xanax) or placebo and 500 mg vaporized cannabis (6.18% THC / <0.025% CBD) or placebo (0% THC / 0% CBD). The primary objective of this study is to validate the Drug Impaired Driving Scenario (DIDS) using the CRCDS-2 driving simulator by assessing the acute effects of cannabis relative to placebo on simulated driving performance. Assay sensitivity will be demonstrated by the significant effect of 0.75 mg alprazolam (active comparator) on driving and cognitive endpoints.

Eligibility Criteria

Inclusion Criteria

  • Understands and provides written informed consent prior to the initiation of any protocol-specific procedures.
  • Able to comprehend and willing to comply with the requirements of the protocol.
  • Healthy male or female adult, 19 to 45 years of age, inclusive, at Screening.
  • Regular sleep pattern (usual bedtime between 21:00 and 00:00).
  • Score 2 alcoholic drinks/day during the last 3 months prior to Screening (1 alcoholic drink is approximately equivalent to: beer [284 mL], wine [125 mL/4 ounces], or distilled spirits [25 mL/1 ounce]). Subjects who consume 3 drinks per day but less than 14 drinks per week may be enrolled at the discretion of the Investigator.
  • Demonstrates simulator sickness questionnaire scores which are indicative of simulator sickness as defined in the driving simulation operations manual.
  • Regularly consumes excessive amounts of caffeine, defined as greater than 6 servings of coffee, tea, cola, or other caffeinated beverages per day.
  • Smokes more than 10 cigarettes or e-cigarettes, or 3 cigars or pipes per day, or is unable to refrain from smoking during study visits.
  • Has been exposed to an investigational drug or device within the 30 days, or 5 half lives (if known), whichever is longer, prior to Screening.
  • Has used a prescription or over-the-counter medication known to cause sedation within 7 days prior to Admission for Period 1 and is unwilling or unable to refrain from sedating medication use during study participation.
  • Has used any benzodiazepine, barbiturate, or GABAA modulator (e.g., eszopiclone, zopiclone, zaleplon, and zolpidem) within 28 days prior to Admission for Period 1 or is unwilling or unable to refrain from medication use during study participation.
  • Has a history of hepatitis B surface antigen, hepatitis C antibodies, or human immunodeficiency virus (HIV) antibodies 1 or 2.
  • Is pregnant or breastfeeding at Screening or any clinic admission or will attempt to become pregnant at any time during study participation.
  • Has a clinically significant abnormal finding on 6-lead electrocardiogram (ECG) at Screening or at any clinic admission. The ECG may be repeated once for confirmatory purposes if initial values obtained exceed the limits specified.
  • Has a positive urine test for drugs of abuse (other than tetrahydrocannabinol (THC)) or Breath Alcohol Concentration (BrAC) > 0.0 at Screening or any admission.
  • Has any clinically significant abnormal physical examination finding at Screening or any clinic admission.
  • Participates in night shift work.
  • Has traveled across ≥1 time zone in the 2 weeks prior to Admission for Period 1 or is expected to travel across ≥1 time zone during the study.
  • Is investigative site personnel or their immediate families (spouse, parent, child, or sibling whether biological or legally adopted).
View full record on ClinicalTrials.gov →

Data sourced from ClinicalTrials.gov (NCT04970342). Outcome figures and adverse-event rates are extracted automatically from the registry's posted results and are provided for clinician reference, not as a substitute for the primary publication.

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