Twenty-five people have been arrested in a 48-hour wave of raids targeting heroin and crack cocaine dealers.
More than 80 charges have already resulted from the operation in Dublin, gardai said.
The arrests focused mainly on the Belcamp and Darndale areas, in the north of the capital.
Those detained over the past two days have already been charged and released on bail. They are due to appear before the courts at a future date.
The raids were part of the wider Operation Boa - a six month covert operation which detectives said has dismantled several drug-dealing rings in Dublin.
Officers from Coolock Garda station and the Garda National Drug Unit have gathered evidence against "significant targets", most of whom are expected to face multiple charges of drug supply, they said.
Another 15 people have already been arrested and charged under the operation, bringing to 40 the total now facing almost 120 charges.
"During the course of searches carried out in the past two days further amounts of cocaine and heroin have also been seized along with ammunition and large amounts of cash," said a Garda spokesman."The focus of this operation has been to gather evidence against significant drug dealers in local communities and ensure these persons are brought before the courts."
Separately, a homegrown cannabis factory was uncovered on Wednesday when a blaze was reported at a house in Skibbereen, west Cork.
More than 500 cannabis plants - with an estimated street value of over 200,000 euro - were seized in the upstairs of the building in North Street.