The short answer
Why cannabis and driving do not mix, and why combining cannabis with alcohol increases impairment.
THC can affect coordination, reaction time, attention, decision-making, and the ability to judge distances.
Combining alcohol with cannabis greatly increases impairment. Combining cannabis with other psychoactive substances can also increase harm.
Do not drive or operate equipment while impaired. Choose a ride that does not depend on you feeling ‘fine enough’ later.
Read the official source
Guidance and services can change. Use the original publisher for current details, and seek qualified local help for your situation.
Source checked November 13, 2026Health Canada — Cannabis impairment and safety risk (opens in a new tab)
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