The New South Wales Government has announced significant reforms to how drug-driving laws apply to people using lawfully prescribed medicinal cannabis. The changes, to be introduced to Parliament by the Minns Government, create what officials describe as a "commonsense" approach for prescribed patients — while keeping strong road-safety protections in place.

For the estimated one million medicinal cannabis users in Australia — including more than 300,000 in NSW — it's one of the most meaningful shifts since medicinal cannabis was legalised nationally in 2016. Here's a clear breakdown of what's proposed and what it means for patients who drive.

Unlike alcohol, which has a measurable legal limit, NSW drug-driving law has operated on a zero-tolerance basis for THC — the active compound in cannabis. A driver could be penalised simply for THC being present in a roadside saliva test, regardless of whether they were actually impaired at the time.

That created a genuine difficulty for prescribed patients. THC can remain detectable for many hours after any effects have worn off, meaning a patient following their doctor's instructions — and not impaired — could still test positive and lose their licence. As Premier Chris Minns put it, current laws already allow people to drive while taking a wide range of prescription medications, "but that doesn't include cannabis prescribed by a medical practitioner."

The number of cannabis medicines dispensed each month in NSW has almost doubled in a 12-month period, making the issue increasingly pressing.

The reform doesn't remove penalties for impaired driving — it creates a managed pathway for registered, prescribed patients.

To be eligible, a driver will need to:

• Enrol as a registered medicinal cannabis user with Transport for NSW
• Provide proof of a valid prescription
• Complete an online education program about cannabis and driving safety

Importantly, the system applies only to NSW drivers on an unrestricted licence. Learner (L), provisional (P) and commercial drivers are excluded.

At the centre of the reform is a measured three-strike system, recognising that a patient may test positive to THC despite using their medication lawfully and responsibly:

1. Positive roadside test: the driver still receives an immediate 24-hour driving ban while the sample goes to a laboratory.
2. Lab result below the threshold: no charge and no further action.
3. Lab result at or above the threshold (first or second time in two years): a warning letter, giving the driver a chance to adjust their dose and driving behaviour.
4. Third detection above the threshold within two years: penalties apply, including a $704 fine and a minimum three-month licence suspension.

The safeguards remain firm. If a driver also has alcohol present, or tests positive to multiple illicit drugs or any drug other than THC, they face the standard drug-driving offence. Registered users are also still subject to post-crash blood and urine testing after serious crashes, and anyone found driving while genuinely impaired faces serious charges.
As Minister for Roads Jenny Aitchison stressed: "This change does not give anyone permission to drive a vehicle while affected by cannabis or any other drug. If you are caught driving while impaired by drugs you will face the full force of the law."

The reform stems from recommendations made at the 2024 NSW Drug Summit, where the government heard that more consideration was needed for people who use medicinal cannabis but also need to drive for work, caring responsibilities and daily life. The new system will be reviewed after one year of implementation.

It reflects a careful, staged approach: registered patients get a managed pathway, but the penalties for genuine impairment stay firmly in place.

Regardless of the reform, the safest position for any prescribed patient remains unchanged:

• Never drive while impaired. The reform explicitly prohibits driving under the influence.
• Register and keep documentation. Eligibility depends on enrolling with Transport for NSW and holding a valid prescription.
• Talk to your doctor about how your prescription and dosage may affect driving, and how long to wait afterwards.
• Know your licence type. The changes apply only to unrestricted NSW licence holders.

The official details are available through the NSW Government release, and Health Direct publishes general health guidance on medicinal cannabis.

By separating "tested positive" from "actually impaired" for registered patients — while keeping strict penalties for genuine impairment — NSW is attempting to strike a balance that patient-advocacy groups have called for since medicinal cannabis became widely prescribed. For the 300,000-plus prescribed patients in NSW, it could mean the difference between keeping their licence and their medication, and having to choose between the two.

This article is general information about Australian law and road safety, not legal or medical advice. Laws change and vary by state — always check the current rules in your state or territory and consult your doctor.