Correct answer
Yes; they can increase risk without alcohol too.
Yes. They can impair attention, perception, judgement and response to danger, even without alcohol. Do not drive with them present in the body. The offence based on presence and the crime of driving under their influence are different cases; not every use automatically becomes a traffic crime. Prescribed therapeutic treatment has a legal exception when the person remains fit to drive diligently and safely.
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All options
Yes; they can increase risk without alcohol too.
They affect risk only when combined with alcohol.
They do not affect serious-crash risk.
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