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

Any drug that changes your mood or the way you see and feel about the world around you will affect the way you drive. Criminal Code and HTA sanctions apply to drivers impaired by alcohol or a drug.

In circumstances involving possible impairment by a drug or a combination of alcohol and a drug, police can require a driver to perform physical co-ordination tests and submit to an evaluation, and then require a driver to provide blood, oral fluid or urine samples. If you fail or refuse to comply with any of these demands, you will be charged under the Criminal Code. You will also receive an immediate 90-day administrative driver’s licence suspension, and be subject to an immediate seven-day vehicle impoundment.

  • 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.