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Quebec SAAQ Knowledge Test · Question

Drugs (including legal medication) can affect driving by:

Many prescription and over-the-counter medications affect the central nervous system, causing side effects like drowsiness, blurred vision, and slowed reaction

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Question: Drugs (including legal medication) can affect driving by:

Answer options:

  • Improving reaction ✅ Causing drowsiness, blurred vision or slow reactions
  • Helping focus
  • No effect

Correct answer: Causing drowsiness, blurred vision or slow reactions

Explanation: Many prescription and over-the-counter medications affect the central nervous system, causing side effects like drowsiness, blurred vision, and slowed reaction times, which directly impair driving ability. The incorrect options are wrong because drugs do not enhance focus or reaction times, nor are they completely harmless to road safety. Under the Quebec Highway Safety Code, driving impaired by any substance, legal or illegal, is prohibited. For the SAAQ exam, candidates must recognize that even legal, therapeutic medication can lead to impaired driving charges if it compromises a driver's physical or mental capacity to safely operate a vehicle.

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