Chapter 3 of 13 · Drink and drug driving · 5 of 8
Drug driving in Ireland: the specified drugs, the roadside test and the disqualification
Checked 15 Oct 2026the Road Traffic Acts, the Criminal Justice Acts and the District Court Rules as amended.
Driving with cannabis, cocaine or heroin above the limit carries a minimum 1 year disqualification, 2 for a repeat; driving while impaired by any drug carries 4 years. The oral fluid test.
Written for the person who has to go to court. This guide covers the District Court of the Republic of Ireland.
Drug driving in Ireland has two offences. One is driving with a specified drug, cannabis, cocaine or heroin, above a limit, which needs no proof that your driving was affected. The other is driving while impaired by any drug, which needs no limit. This guide explains both, the roadside oral fluid test and the blood specimen, the disqualification periods, prescription medicines, and the mandatory test after a serious collision.
The two offences
Driving with a specified drug above the limit. The Road Traffic Act 2016 added this offence. It is committed by driving with a concentration of cannabis, cocaine or heroin in your blood above the limit set in the Act, whether or not your driving was affected. The Act fixes a minimum disqualification of one year for a first offence and two years for a repeat, with a fine of up to €5,000 and/or up to six months in custody.
Driving while impaired. Section 4(1) of the Road Traffic Act 2010 makes it an offence to drive while under the influence of an intoxicant to such an extent as to be incapable of having proper control of the vehicle. An intoxicant includes any drug, legal or illegal, prescribed or bought over the counter, and alcohol in combination with drugs. There is no limit to be over. The Garda's evidence of your driving and your condition, backed by a doctor's examination and the blood result, grounds the charge. The minimum disqualification is four years for a first offence and six for a second, the same as for alcohol.
The two can be charged together where a positive blood result sits alongside evidence of bad driving.
There is no fixed penalty notice for drugs. Every drug driving charge is a summons to the District Court.
The roadside
The Garda can require a preliminary oral fluid test at a mandatory intoxicant testing checkpoint, where they have formed an opinion that you have taken a drug, or after a collision. You give a saliva sample on a swab and the device screens it for cannabis, cocaine, opiates and benzodiazepines. The roadside result takes a few minutes.
A positive screen is grounds for arrest. So is a failed roadside impairment test, where the Garda assesses balance, coordination and the eyes, and so is the Garda's opinion that you are impaired even where the screen is clear. The roadside result is not the evidence the court uses.
Refusing the roadside test is an offence, as the refusal guide explains.
The station
At the station the Garda requires a specimen of blood, taken by a designated doctor or nurse, and sends it to the Medical Bureau of Road Safety for analysis. The Bureau's certificate states the drugs found and their concentration and is the evidence the court relies on. Where impairment is alleged, a doctor may also examine you at the station and that report is evidence too.
The result comes by post, weeks later. Keep it. It tells you which offence you face and, for a specified drug, whether the reading is above the limit.
The disqualification periods
| Offence | First offence | Repeat |
|---|---|---|
| Specified drug above the limit (2016 Act) | 1 year | 2 years |
| Impaired by any drug, s.4(1) of the 2010 Act | 4 years | 6 years |
Both are minimums. The court cannot go below them, can go above them, and can impose the fine and custody alongside. The disqualification takes effect from the fifteenth day after the order unless an appeal is lodged and the recognisance entered, as the disqualification periods guide explains. When it ends you apply to the NDLS (see the glossary) for a new licence; see getting your licence back.
Prescription medicines
Three things to separate.
First, the specified-drug offence concerns cannabis, cocaine and heroin. Most prescribed medicines are none of these, so a positive for, say, a benzodiazepine on the roadside screen does not by itself ground the specified-drug charge.
Second, the impairment offence covers any drug. Driving while a prescribed medicine has left you unfit to control the car is an offence, and the prescription is not a defence to it. The leaflet's warning about driving matters here, and so does the doctor's examination at the station.
Third, the 2016 Act provides for a medical exemption certificate for a driver who has been prescribed a cannabis-based medicine. Carried and produced, it answers the specified-drug charge for cannabis. It is not an answer to an impairment charge.
If you drive on a prescribed medicine that could affect you, the practical steps are the ones your pharmacist gives: read the warning, allow the adjustment period, and do not drive if you feel affected.
The test after a serious collision
Since the Road Traffic Act 2024, a roadside intoxicant test is mandatory for a driver involved in a serious collision, where the Garda is able to require it. Before the 2024 Act the Garda had a discretion. The test now follows a serious collision as a matter of course, alongside the alcohol test, and a positive result is dealt with as any other.
How long drugs stay detectable
The question people type is how long after cannabis, or cocaine, it is safe to drive. The blood test measures the active compound rather than the metabolites that stay in urine for weeks, and for most people the active compound falls over hours. But the limit in the Act is low, individual clearance varies, and regular cannabis users can test above the limit long after the effects have gone. The figures that circulate online are not reliable for any one person, and the Act does not care how you felt. The only safe interval is not to drive after using.
The 2025 figures
The Courts Service Annual Report 2025, published on 13 July 2026, counts drink and drug driving together: 9,784 orders, 3,663 disqualifications, 100 sentences of imprisonment. The Garda reported detecting over 8,100 intoxicated drivers in 2025 across both. A separate drug driving figure for the courts is not published in the report.
At court
The summons arrives twelve to fourteen weeks or more after the Garda applies for it. At the first appearance the charge is read and you plead or ask for time; an adjournment for advice is normally granted. If your means are insufficient, apply for legal aid under the Criminal Justice (Legal Aid) Act 1962 with a statement of means before anything else. On a guilty plea the Garda outlines the facts and you or your solicitor speak in mitigation: the reading, the circumstances of the stop, your record, your work and family, and steps taken since. On a not guilty plea a hearing date is fixed and the prosecution's statements and the Bureau's certificate can be sought.
A conviction is a criminal record, spent after seven years as a District Court motoring conviction under the Criminal Justice (Spent Convictions and Certain Disclosures) Act 2016, but disclosed in the meantime; see is drink driving a criminal record, which applies equally to drugs. Insurance is covered in car insurance after a drink driving conviction.
Where this leaves you
The drink and drug driving checker shows the minimum disqualification the Act fixes for each drug driving offence and the fine and custody the court can impose. The court date tool counts the days to the summons date and the appeal window after an order, and find a court gives you the office.
If you may qualify for legal aid, ask the judge for it at your first appearance. A solicitor is the person to read the Bureau's certificate with you. If drug use is part of the picture, the support page lists services that can help, and a court tends to notice when someone has started.
Frequently asked questions
What is the penalty for drug driving in Ireland?
Driving with cannabis, cocaine or heroin above the limit in the Road Traffic Act 2016 carries a minimum disqualification of one year for a first offence and two years for a repeat, with a fine of up to €5,000 and/or up to six months. Driving while impaired by any drug carries a minimum of four years. There is no fixed penalty notice for drugs.
How does the roadside drug test work?
The Garda takes a swab of saliva and places it in an oral fluid testing device, which screens for cannabis, cocaine, opiates and benzodiazepines in a few minutes. A positive result or signs of impairment leads to arrest and a blood specimen at the station, which is what the court relies on.
Can you be done for drug driving on prescription medication?
Yes, if the medication impairs your driving. The impairment offence under section 4(1) of the Road Traffic Act 2010 covers any drug, prescribed or not. The 2016 Act allows a medical exemption certificate for a driver prescribed a cannabis-based medicine, which answers the specified-drug charge but not an impairment charge.
How long does cannabis stay detectable for drug driving?
The blood test measures the active compound, which falls over hours rather than days for most users, but the limit in the Act is low and regular users can test above it well after the effects have worn off. No figure works for everyone, which is why the only safe interval is not to drive after using.
Is drug driving a criminal record?
Yes. There is no notice route for drugs, so every drug driving charge is a summons to the District Court and a conviction there is a criminal record. As a District Court motoring conviction it can become spent after seven years under the 2016 spent convictions Act.