We are currently aware of an issue with medical condition reporting via the online driver licence renewal service.

If you are affected, we will contact you directly. If you have received communication on this issue, please ensure you follow the instructions provided.

Medicinal cannabis

You must not drive

It’s illegal for you to drive if you’re being treated with medical cannabis that contains THC (delta-9-tetrahydrocannabinol). THC is the main psychoactive component in most cannabis.

You can’t use a valid prescription for medicinal cannabis to defend a charge if you test positive for THC in a roadside drug test.

We suggest you speak with your doctor regarding your specific prescription.

Why it’s illegal

Using THC can affect your ability to drive, including:

being slower to react
not staying in your lane
not controlling the car as well
not judging time and space well
not keeping enough space between vehicles
not staying alert.

Unlike alcohol, there’s no set amount of cannabis that makes it okay to drive. This means it’s hard to make a rule about how much is safe for driving.

Last updated:: 5 December 2024