Gardaí from the City Centre Policing Unit, Anglesea Street and the Bridewell carried out a search of an apartment on Barrack Street at around 8pm last night.
They found cannabis oils and vape pens as well as cannabis jellies.
A man in his twenties was taken into custody and is currently being detained at the Bridewell Garda Station.
The operation is part of an ongoing operation targeting the sale and supply of drugs in the City Centre.
