Members of the Laois Roads Policing Unit stopped the vehicle.
A driver has been arrested on suspicion of drug driving after a concerned member of the public reported the motorist driving erratically in Laois.
Members of the Roads Policing Unit stopped the vehicle in Portlaoise.
A roadside test indicated the presence of opiates and cannabis.
A quantity of cannabis and heroin were also seized in the incident.
Gardai are advising people to report traffic related issues to their Traffic Watch number 1890 205 805.
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