Drug Driving Cairns — Penalties, Medicinal Cannabis and Queensland Law

The Queensland Drug Driving Framework

Queensland's drug driving laws are governed by the Transport Operations (Road Use Management) Act 1995 (Qld). The framework is based on presence, not impairment. Under the drug driving provision, it is an offence to drive or be in charge of a vehicle while a "relevant drug" is present in your saliva or blood. The amount does not matter. The level of impairment does not matter. If a relevant drug is detectable, you have committed an offence.

The four relevant drugs detected by roadside saliva testing in Queensland are:

• THC (delta-9-tetrahydrocannabinol) — the active psychoactive component of cannabis
• Methylamphetamine — methamphetamine, commonly known as "ice" or "speed"
• MDMA — 3,4-methylenedioxymethamphetamine, commonly known as "ecstasy"
• Cocaine — added to the list of relevant drugs, and now tested for at the roadside

Other controlled substances — heroin, prescription opioids, benzodiazepines, ketamine — are not detected by the roadside saliva test but can be identified through blood analysis, which is typically ordered after traffic accidents or where the officer suspects impairment from a substance not covered by saliva testing.

Penalties for Drug Driving in Queensland

The penalties for drug driving are set out in the TORUM Act of the TORUM Act and follow a tiered structure based on prior offending history:

First Offence

• Maximum fine: 14 penalty units, currently $2,417.80
• Disqualification: 1 to 9 months on an open licence; 3 to 9 months if you were unlicensed or held a learner, probationary, provisional or restricted licence. Disqualification is mandatory.
• Imprisonment: up to 3 months. Rarely imposed on a first offence, but available.
• Work licence: available for open licence holders charged with the standard drug driving offence. Not available for learner, provisional (P1/P2), heavy vehicle, restricted, or interlock drivers, or for the more serious DUI-by-drug charge

Second Offence (one prior within 5 years)

• Maximum fine: 28 penalty units, currently $4,835.60
• Disqualification: minimum 3 months, maximum 18 months
• Imprisonment: up to 6 months

Third or Subsequent Offence (two or more priors within 5 years)

• Maximum fine: 36 penalty units, currently $6,217.20
• Disqualification: 6 months, fixed by operation of law (the court has no discretion)
• Imprisonment: up to 9 months

The maximum fines for a second and third offence went up on 31 August 2026. For an offence committed before that date the older maximums apply — 20 penalty units for a second offence and 28 for a third — because a person cannot be punished beyond the maximum that was in force when the offence was committed.

Where a Prior Conviction Is DUI or Dangerous Driving

• Maximum fine: 42 penalty units, currently $7,253.40, or 1 year's imprisonment, where there is a prior conviction for driving under the influence, for dangerous operation of a vehicle, or for a driving offence dealt with on indictment
• Maximum fine: 72 penalty units, currently $12,434.40, or 18 months' imprisonment, where there is a prior of that kind and a prior drink or drug driving conviction
• Disqualification: fixed at 9 months in the first case and 1 year in the second

The "within 5 years" calculation is important. Queensland counts prior drink and drug driving convictions in the 5 years before conviction when determining the penalty tier. An offence older than five years does not count — a person with a 2019 drug driving conviction is treated as a first offender in 2026.

Important: prior drink driving convictions do count. The repeat-offence tiers are not limited to prior drug driving. A drink driving conviction in the last 5 years puts a drug driving charge on the second or third offence tier, and a prior conviction for driving under the influence or dangerous operation lifts the maximum further again.

Medicinal Cannabis and Drug Driving — The 2026 Legal Position

This is the most significant practical issue in Queensland drug driving law. Medicinal cannabis prescribing in Australia has grown steeply through the Therapeutic Goods Administration's Special Access Scheme and Authorised Prescriber pathway. The TGA publishes approval numbers, not patient numbers, so no reliable count of patients exists. In Far North Queensland, the number of medicinal cannabis patients is growing rapidly — particularly for chronic pain, PTSD, anxiety, and insomnia.

The legal position is clear and, for many patients, deeply frustrating:

Why the Law Has Not Changed

Queensland has built its drug driving offence on presence rather than on an impairment threshold. Alcohol is different: the Act sets numeric limits and, above the high alcohol limit, deems the driver to have been under the influence. For relevant drugs there is no equivalent threshold, and no amount is too small. Reform has been advocated for several years. It has not happened.

Queensland has kept the zero-tolerance approach, and it captures people who are prescribed cannabis and are not impaired. This position is contested by patient advocacy groups, the medical profession, and a growing number of legal practitioners.

What Medicinal Cannabis Patients Need to Know

• THC detection windows — How long THC stays detectable in saliva varies with the product, the dose, the frequency of use, and individual metabolism. For regular users (daily medicinal use), THC may be detectable at virtually all times.
• No safe waiting period — unlike alcohol, where a person can estimate the time needed for their BAC to return to zero, there is no reliable way to predict when THC will no longer be detectable in saliva. This means there is no guaranteed "safe" window for driving after using medicinal cannabis.
• The choice — under the current law, patients prescribed THC-containing medicinal cannabis face a binary choice: use the medication as prescribed and accept the risk of a drug driving charge, or refrain from driving. For patients in regional areas like Cairns and Far North Queensland, where public transport is limited and driving is essential, this is a genuine hardship.
• Other states — Tasmania and the ACT have enacted medicinal cannabis driving defences. Victoria and New South Wales have conducted or are conducting trials. Queensland has not enacted a defence and has not announced plans to do so.

Sentencing Factors Specific to Drug Driving

The sentencing outcome for a drug driving charge depends on several factors that the magistrate weighs when determining the disqualification period and fine within the statutory range:

Type of Drug

In practice, the type of drug detected influences sentencing. A THC-only result (cannabis) is generally viewed less seriously than a methylamphetamine result (ice). This is not reflected in the legislation — the penalties are the same regardless of which relevant drug is detected — but it is reflected in sentencing practice in the Cairns Magistrates Court.

Context of Use

The circumstances of the drug use are relevant. A person who used cannabis at home the previous evening and drove the following day presents a different sentencing picture from a person who used methylamphetamine an hour before driving. The delay between use and driving, while not a legal defence, is a relevant sentencing factor.

Medicinal Use

While medicinal cannabis is not a legal defence to the charge, it is a relevant sentencing factor. A person who tests positive to THC because they are using a prescribed medication for a genuine medical condition will generally receive a more lenient sentence than a person using cannabis recreationally. The prescription, the treating doctor's letter, and the medical records should be presented to the magistrate at sentencing.

Traffic and Criminal History

A clean traffic history and no prior criminal record are the strongest mitigating factors. Prior drug driving offences within five years elevate the penalty tier. Prior drink driving offences count towards the penalty tier as well, and are relevant to the magistrate's assessment of the defendant's overall pattern of behaviour on the road.

Drug Driving and Employment

A drug driving disqualification has a disproportionate impact on employment in Far North Queensland. In Cairns and the surrounding region, public transport options are limited, distances are significant, and many jobs — trades, construction, agriculture, tourism, transport — require driving. Whether a work licence is available depends on the type of charge and the driver's licence category.

Open licence holders charged with the standard drug driving offence (drug present in your system) can apply for a work licence, subject to the usual requirements — no prior conviction or disqualification within five years, you were not driving for work at the time, and you must demonstrate extreme hardship. Learner, provisional (P1/P2), heavy vehicle, taxi, rideshare, restricted, and interlock drivers cannot apply, even for the standard charge. And anyone charged with the more serious offence of Driving Under the Influence (DUI) of a drug cannot apply regardless of licence type.

For employees whose job requires driving, a drug driving conviction may result in:

• Termination — if the employment contract specifies driving as an essential requirement and the employee cannot perform the role without a licence
• Demotion or reassignment — to a role that does not require driving, if one is available
• Loss of income — reduced hours or reduced pay during the disqualification period

This employment impact is relevant to sentencing — a shorter disqualification within the available range may be appropriate where the consequence of a longer disqualification is loss of employment. The employer's letter confirming the impact is critical evidence.

Comparing Drink Driving and Drug Driving Penalties

The penalty structures are similar but the practical consequences differ in important ways:

• Work licence — available for eligible drink driving charges (open licence holders). For drug driving, available only to open licence holders charged with the standard offence. Learner, provisional (P1/P2), heavy vehicle, restricted, and interlock drivers cannot apply. DUI-by-drug is always barred.
• Interlock device — required for mid-range and high-range drink driving. Not applicable to drug driving.
• Legal limit — drink driving has a tiered system based on BAC (0.050, 0.100, 0.150). Drug driving is zero-tolerance — any detectable amount.
• Detection window — alcohol clears the system within hours. THC can be detected for days. This means the risk period for drug driving extends far beyond the period of impairment.

Law Reform Advocacy

The interaction between medicinal cannabis prescriptions and zero-tolerance drug driving laws is the subject of active advocacy across Australia. The key arguments for reform include:

• Patients are being criminalised for using legally prescribed medication
• The zero-tolerance approach does not correlate with impairment — a patient who used medicinal cannabis 24 hours before driving may test positive but is not impaired
• Regional patients are disproportionately affected because they have no alternative to driving
• Tasmania and the ACT have enacted defences without measurable increases in drug-impaired driving

Until Queensland law changes, however, the position remains: a positive THC result is a criminal offence, regardless of the reason for the THC being present. Patients who use THC-containing medicinal cannabis and drive accept this legal risk.