Cannabis Driving Laws in Victoria

Driving under the influence of cannabis has long been a complex legal issue in Victoria, particularly for patients using medicinal cannabis products. With recent changes to the law in 2025, it's more important than ever to understand your rights and responsibilities when it comes to THC and driving. We break down the latest updates, legal risks, and practical tips for staying safe and compliant under Victoria’s cannabis driving laws.

New Driving Law for Medicinal Cannabis Patients in Victoria

As of March 1, 2025, Victorian drivers with a valid medicinal cannabis prescription no longer face automatic license suspension if they test positive for THC (tetrahydrocannabinol) during a roadside drug test.

Under the amended Road Safety Act 1986, magistrates now have the discretion to consider the following factors before deciding on penalties:

  • The driver holds a current prescription for medicinal cannabis.

  • The driver used the medication as prescribed.

  • The driver was not impaired at the time of driving.

Previously, any detectable amount of THC—regardless of impairment or prescription—resulted in a mandatory licence suspension of at least six months.

Important Notes

  • Driving with THC in your system remains an offence.

  • Police have discretion to waive licence suspension for prescribed, unimpaired drivers.

  • Other penalties, such as fines, may still apply.

  • Roadside drug testing practices remain unchanged; police will continue to test for THC.

Tips for Medicinal Cannabis Patients

  • Carry proof of your prescription when driving.

  • Avoid driving if you feel impaired, even if you have a prescription.

  • Consult your doctor or pharmacist to understand how your medication may affect your ability to drive.