Gardaí seized €20,000 of suspected cannabis herb having stopped and searched a car in Loughrea yesterday evening.
Gardaí attached to the Galway Divisional Drugs Unit conducted the search shortly before 8pm in the Bookeen North area of Loughrea.
A woman in her mid-20s was arrested. She was later released without charge.
A file is now being prepared for the Director of Public Prosecutions.
Investigations are ongoing.