Cannabis medicines are pharmaceutical-grade products containing active cannabinoids, which can cause impairment and affect fitness to drive. Whether it is illegal or appropriate for a person to drive after taking cannabis medicines will depend on the type of medication prescribed.

It is illegal for patients taking cannabis medicines which contain delta-9-tetrahydrocannabinol (THC) to drive. This is because THC can affect the cognitive and motor skills necessary for safe driving, such as attention, judgement, memory, vision and coordination.

Patients taking cannabidiol(CBD)-only medicines can lawfully drive if they are not impaired. As CBD can cause drowsiness, fatigue and low blood pressure, doctors should discuss usage and risk of impairment with their patients.   

The below factsheet advises health professionals about driving and cannabis medicines.