Roadside drug testing in Ireland has increased significantly in recent years. Testing positive — even days after you last used cannabis or other substances — can lead to arrest, court, and disqualification. Many people are caught completely by surprise.
Damian was stopped at a routine checkpoint on the M1. He hadn't used cannabis in four days and felt completely sober. The oral fluid test at the roadside came back positive for THC. He was brought to a Garda station, had blood taken, and was charged two months later when the lab results confirmed the positive reading. He was facing disqualification and a criminal record.
Under the Road Traffic Act 2010 (as amended), it is an offence to drive while impaired by drugs, or to drive with certain specified drugs present in your body above set thresholds. Cannabis (THC), cocaine, heroin, and other substances are covered.
Importantly, impairment does not need to be proven for a drug driving charge — if the substance is present in your blood above the legal threshold, that is sufficient. THC in particular can remain detectable in blood for 12–36 hours after use even when there is no impairment. Penalties mirror those for drink driving: mandatory disqualification, fines, and potential imprisonment for serious cases.
A conviction for this offence goes on your Garda record and may affect employment, insurance, and travel for years. Getting legal advice early — before your court date — gives you the best chance of the best possible outcome.
Damian's solicitor obtained expert evidence on the pharmacology of THC and how long it remains detectable after use. The solicitor argued there was no evidence of impairment and that the detection level barely exceeded the threshold. The judge took this into account. Damian received a reduced disqualification period and no imprisonment.
✓ Reduced penalty — no imprisonmentNo obligation. Matched to a specialist solicitor within 24 hours.
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