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Few studies have been conducted to assess the pharmacokinetic and pharmacodynamic effects of smoked and vaporized cannabis. Careful analysis of different cannabis administration methods on these parameters is required to determine the level and duration of biological cannabinoid exposure and associated subjective, cardiovascular and cognitive effects. In the present study the investigators evaluated the detection of cannabinoids in whole blood, oral fluid, and urine, as well as the acute pharmacodynamics associated with smoked and vaporized cannabis among individuals who were not regular cannabis users. The outcomes of the study will extend scientific knowledge about the behavioral pharmacology and toxicology of smoked and vaporized cannabis administration and can inform policies regarding clinical, workplace and roadside drug testing programs.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| 0mg THC smoked cannabis | Experimental | placebo smoked cannabis |
|
| 10mg THC smoked cannabis | Experimental | smoked cannabis containing 10mg THC |
|
| 25mg THC smoked cannabis | Experimental | smoked cannabis containing 25mg THC |
|
| 0mg THC vaporized cannabis | Experimental | placebo vaporized cannabis |
|
| 10mg THC vaporized cannabis | Experimental | vaporized cannabis containing 10mg THC |
|
| 25mg THC vaporized cannabis | Experimental | vaporized cannabis containing 25mg THC |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Cannabis | Drug | Inhaled cannabis |
|
| Measure | Description | Time Frame |
|---|---|---|
| Quantity of THC in blood | Quantitative measurement of blood THC by LC-MS/MS | 8 hours post exposure |
| Measure | Description | Time Frame |
|---|---|---|
| Subjective rating of "Drug Effect" | Visual Analog Scale rating of subjective drug effect. Score ranges from 0 (none) to 100 (extreme) using a 100mm line anchored with none/extreme designation. | 8 hours post exposure |
| Psychomotor performance as assessed by Digit Symbol Substitution Task |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Ryan Vandrey, PhD | Johns Hopkins School of Medicine Behavioral Pharmacology Research Unit | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Johns Hopkins School of Medicine Behavioral Pharmacology Research Unit | Baltimore | Maryland | 21224 | United States |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 30646391 | Derived | Spindle TR, Cone EJ, Schlienz NJ, Mitchell JM, Bigelow GE, Flegel R, Hayes E, Vandrey R. Acute Effects of Smoked and Vaporized Cannabis in Healthy Adults Who Infrequently Use Cannabis: A Crossover Trial. JAMA Netw Open. 2018 Nov 2;1(7):e184841. doi: 10.1001/jamanetworkopen.2018.4841. |
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| ID | Term |
|---|---|
| D002189 | Marijuana Abuse |
| ID | Term |
|---|---|
| D019966 | Substance-Related Disorders |
| D064419 | Chemically-Induced Disorders |
| D001523 | Mental Disorders |
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| ID | Term |
|---|---|
| C587251 | nabiximols |
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Computerized version of Digit Symbol Substitution Task administered, total correct trials in 90-seconds measured |
| 8 hours post exposure |
| Memory performance as assessed by Paced Auditory Serial Addition Task | Computerized version of Paced Auditory Serial Addition Task administered, total correct trials out of 90 recorded | 8 hours post exposure |
| Performance on Divided Attention Task | Computerized Divided Attention Task administered, mean distance from central stimulus and number of targets correct out of 24 recorded | 8 hours post exposure |