The drugs were detected on Thursday, November 12th as part of an intelligence-led operation.
A car was searched in the Newcastle are of the city at approximately 1pm as part of the operation.
During the search €25,000 worth of heroin, €14,000 worth of cocaine and €18,000 in cash was discovered.
A man in his 30s was arrested in connection with the drugs and has since been released.
A file is being prepared for the Director of Public Prosecutions and enquiries are ongoing.