Ministry of Transportation / Ministère des Transports
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III. Other ways to lose your licence

The police can stop any driver to determine if drug testing is required. Criminal Code and HTA sanctions apply to drivers impaired by alcohol or a drug.

Drugs in all forms, including cannabis, illegal drugs, prescription drugs or over-the-counter medications, can have dangerous effects:

  • If you use prescription medicines or get allergy shots, ask your doctor about side effects such as dizziness, blurred vision, nausea or drowsiness that could affect your driving.
  • Read the information on the package of any over-the-counter medicine you take. Any stimulant, diet pill, tranquillizer or sedative may affect your driving. Even allergy and cold remedies may have ingredients that could affect your driving.
  • Drugs and alcohol together can have dangerous effects, even several days after you have taken the drug.

Do not take a chance; ask your doctor or pharmacist before you drive.