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Processing and Effects of Cannabis

The recruitment status of this study is unknown. The completion date has passed and the status has not been verified in more than two years.
Verified March 2005 by UMC Utrecht.
Recruitment status was:  Recruiting
Netherlands: Ministry of Health, Welfare and Sports
Information provided by:
UMC Utrecht Identifier:
First received: September 21, 2005
Last updated: NA
Last verified: March 2005
History: No changes posted
The purpose of this study is to investigate the processing of cannabis, and to investigate the occurrence of effects of cannabis on the cardiovascular system and the central nervous system; at higher levels of exposure.

Condition Intervention Phase
Hypotension Tachycardia Drug: Smoking of cannabis cigarettes (different strength) Phase 1

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Double
Primary Purpose: Prevention
Official Title: A Double-Blind, Randomised, Placebo-Controlled, Cross-Over Study on the Pharmacokinetics and Effects of Cannabis

Resource links provided by NLM:

Further study details as provided by UMC Utrecht:

Primary Outcome Measures:
  • Serum concentration over time
  • Physical parameters (heart rate, blood pressure)
  • Psychomotor tests (such continuous attention)
  • Event related potentials

Secondary Outcome Measures:
  • Self-reporting questionnaires

Estimated Enrollment: 27
Study Start Date: July 2005
Estimated Study Completion Date: December 2005
Detailed Description:
In Europe, cannabis is the most illicit used drug, mainly for its psychoactive properties (becoming "high" or "stoned"). The active compound in cannabis is THC (tetrahydrocannabinol). In recent years the strength of cannabis (marihuana) available on the market in the Netherland has increased (especially "netherweed"). The THC-content has increased from on average 8.6% in 2000 to on average 20.3% in 2004. Experienced users adapt their habit of smoking to the strength of the cannabis sigaret (joint). However, there is also a group of people, mainly young ones, who intent to smoke the joint entirely, and can therefore be exposed to higher levels of THC. Information is lacking about the effects of cannabis at higher levels of exposure. Because of this, the Ministry of Health, Welfare, and Sports of the Netherlands ordered the investigators to perform a study to gain more insight in this issue.

Ages Eligible for Study:   18 Years to 45 Years   (Adult)
Sexes Eligible for Study:   Male
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Cannabis users (2-9 joints per month)

Exclusion Criteria:

  • Psychiatric illness
  • Evidence of excessive alcohol abuse
  • Use of other drugs
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00225407

Contact: Tjeert T Mensinga, MD, PhD +31 30 2507340

University Medical Center Utrecht Recruiting
Utrecht, Netherlands
Contact: Tjeert T Mensinga, MD, PhD    +31 30 2507340   
Principal Investigator: Tjeert T Mensinga, MD, PhD         
Sponsors and Collaborators
UMC Utrecht
Netherlands: Ministry of Health, Welfare and Sports
Principal Investigator: Tjeert T Mensinga, MD, PhD National Institute of Public Health and the Environment, the Netherlands
  More Information

Publications automatically indexed to this study by Identifier (NCT Number): Identifier: NCT00225407     History of Changes
Other Study ID Numbers: V/267002
Study First Received: September 21, 2005
Last Updated: September 21, 2005

Keywords provided by UMC Utrecht:
Psychomotor tests
Event related potentials

Additional relevant MeSH terms:
Marijuana Abuse
Vascular Diseases
Cardiovascular Diseases
Arrhythmias, Cardiac
Heart Diseases
Pathologic Processes
Substance-Related Disorders
Chemically-Induced Disorders
Mental Disorders processed this record on August 18, 2017