E.1 Medical condition or disease under investigation |
E.1.1 | Medical condition(s) being investigated |
This study will look at the differential effects of variations in cannabis chemovars on driving ability and cognition |
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E.1.1.1 | Medical condition in easily understood language |
Effects of cannabis on driving and cognition |
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E.1.1.2 | Therapeutic area | Not possible to specify |
MedDRA Classification |
E.1.3 | Condition being studied is a rare disease | No |
E.2 Objective of the trial |
E.2.1 | Main objective of the trial |
The main objective of this study is to test whether variations in the CBD content of vaporised cannabis alter the impairing effects of THC on driving ability. To test this, we will compare the effects of three cannabis chemovars (A: High THC / Low CBD (Bedrocan); B: High THC / High CBD (Bedrocan/Bedrolite); C: High CBD / Low THC (Bedrolite) and placebo in 20 occasional cannabis users. The primary outcome measure is standard deviation of lateral position (SDLP; i.e. lane weaving), a measure of driving performance which is highly sensitive to the effects of drugs and alcohol. |
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E.2.2 | Secondary objectives of the trial |
This study will also seek to test whether variations in the CBD content of vaporised cannabis alter the effects THC on cognitive task performance and subjective drug effects (e.g. stoned, sedated). This study will also look at plasma concentrations of THC, CBD and their metabolites to assess whether CBD modulates THC pharmacokinetics. |
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E.2.3 | Trial contains a sub-study | No |
E.3 | Principal inclusion criteria |
• Occasional cannabis users (>10 lifetime exposures and <2x/week in the last 12 months)
• Age between 20-50
• Good physical health as determined by medical examination and laboratory analysis
• Absence of any major medical, endocrine and neurological condition
• Normal weight, body mass index (weight/height2) between 20 and 28 kg/m2
• In possession of a valid driver license with at least 2 years driving experience (having driven > 3000 km/yr)
• Written Informed Consent
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E.4 | Principal exclusion criteria |
• History of drug abuse (other than the use of cannabis) or addiction (determined by the medical questionnaire, drug questionnaire and medical examination)
• Pregnancy or lactation (pregnancy test, if needed)
• Hypertension (diastolic> 90; systolic> 140)
• Current or history of psychiatric disorder (determined by the medical questionnaire and medical examination)
• Liver dysfunction
• Use of medications that may impact upon driving ability (e.g. mood stabilisers, sedatives)
• Any serious prior adverse response to cannabis
• History of cardiac dysfunctions (e.g. arrhythmia, ischemic heart disease)
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E.5 End points |
E.5.1 | Primary end point(s) |
1: Driving performance, as assessed by standard deviation of lateral position (SDLP) |
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E.5.1.1 | Timepoint(s) of evaluation of this end point |
On-road driving performance will be assessed in each experimental session at 0.75 h and 4 h after drug administration. |
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E.5.2 | Secondary end point(s) |
1) Additional measures of driving performance, including:
a) Time out of lane (TOL)
b) Mean speed
c) Standard deviation of speed
2) Performance on the Digit Symbol Substitution Task (DSST), Divided Attention Task (DAT); Paced Auditory Serial Addition Task (PASAT) and Tower of London task (TOL)
3) Subjective ratings of drug effects and confidence in driving ability
4) Plasma concentrations of THC, 11-OH-THC, THCCOOH and CBD |
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E.5.2.1 | Timepoint(s) of evaluation of this end point |
1) On-road driving performance will be assessed in each experimental session at 0.75 h and 4 h after drug administration.
2) Performance on the DSST, DAT and PASAT will be assessed at baseline and at 0.25 h and 3.5 h after drug administration. TOL task performance will be assessed at 2.33 h.
3) Subjective drug effects and confidence in driving ability will be assessed at baseline and at 0.25 h, 0.75 h, 2.33 h, 3.5 h and 5.5 h after drug administration.
4) Plasma samples will be taken as baseline and at 0.1 h, 0.5 h, 2.25 h, 3.5 h and 5.5 h. |
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E.6 and E.7 Scope of the trial |
E.6 | Scope of the trial |
E.6.1 | Diagnosis | No |
E.6.2 | Prophylaxis | No |
E.6.3 | Therapy | No |
E.6.4 | Safety | Yes |
E.6.5 | Efficacy | No |
E.6.6 | Pharmacokinetic | Yes |
E.6.7 | Pharmacodynamic | Yes |
E.6.8 | Bioequivalence | No |
E.6.9 | Dose response | No |
E.6.10 | Pharmacogenetic | No |
E.6.11 | Pharmacogenomic | No |
E.6.12 | Pharmacoeconomic | No |
E.6.13 | Others | No |
E.7 | Trial type and phase |
E.7.1 | Human pharmacology (Phase I) | No |
E.7.1.1 | First administration to humans | No |
E.7.1.2 | Bioequivalence study | No |
E.7.1.3 | Other | No |
E.7.1.3.1 | Other trial type description | |
E.7.2 | Therapeutic exploratory (Phase II) | No |
E.7.3 | Therapeutic confirmatory (Phase III) | No |
E.7.4 | Therapeutic use (Phase IV) | Yes |
E.8 Design of the trial |
E.8.1 | Controlled | Yes |
E.8.1.1 | Randomised | Yes |
E.8.1.2 | Open | No |
E.8.1.3 | Single blind | No |
E.8.1.4 | Double blind | Yes |
E.8.1.5 | Parallel group | No |
E.8.1.6 | Cross over | Yes |
E.8.1.7 | Other | No |
E.8.2 | Comparator of controlled trial |
E.8.2.1 | Other medicinal product(s) | No |
E.8.2.2 | Placebo | Yes |
E.8.2.3 | Other | No |
E.8.2.4 | Number of treatment arms in the trial | 4 |
E.8.3 |
The trial involves single site in the Member State concerned
| Yes |
E.8.4 | The trial involves multiple sites in the Member State concerned | No |
E.8.5 | The trial involves multiple Member States | No |
E.8.6 Trial involving sites outside the EEA |
E.8.6.1 | Trial being conducted both within and outside the EEA | No |
E.8.6.2 | Trial being conducted completely outside of the EEA | No |
E.8.7 | Trial has a data monitoring committee | No |
E.8.8 |
Definition of the end of the trial and justification where it is not the last
visit of the last subject undergoing the trial
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E.8.9 Initial estimate of the duration of the trial |
E.8.9.1 | In the Member State concerned years | 1 |
E.8.9.1 | In the Member State concerned months | 0 |
E.8.9.1 | In the Member State concerned days | 0 |