New study to test if age changes how cannabis affects driving
NCT ID NCT04325958
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study looks at how age and how often someone uses cannabis affect driving skills. Researchers will compare young (19-25) and middle-aged (35-45) drivers who use cannabis occasionally or frequently. Participants will smoke a cannabis cigarette or a placebo and then drive in a simulator to measure weaving, speed, and following distance.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
Active substance
Cannabis (marijuana)
What this could lead to
If successful, this study could help understand how age and cannabis use frequency impact driving ability, potentially informing safer driving guidelines.
What could go wrong
This is an early-phase observational study with a small sample (128 participants) using a driving simulator, not real roads. Results may not reflect real-world driving or apply to all users.
Disclaimer
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the original study
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Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
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Study contacts
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Contact
Phone: •••-•••-•••• Email: •••••@•••••
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Contact
Phone: •••-•••-•••• Email: •••••@•••••
Locations
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Centre for Addiction and Mental Health
RECRUITINGToronto, Ontario, M5S 2S1, Canada
Contact Phone: •••-•••-•••• Email: •••••@•••••