A tabloid newspaper report this morning claims cocaine is being snorted in Leinster House.
The Irish Daily Mirror says tests it conducted on swabs taken from the toilets at Leinster House found traces of the class A drug.
The newspaper said the toilets tested were close to the visitors' bar and just metres from the main Dáil chamber.
Gráinne Kenny of Europe Against Drugs is calling for gardaí to be drafted in to investigate the matter.
"This is our seat of government," she said. "Drugs are destroying this country. This can't be swept under the carpet."
Fine Gael TD Damien English, meanwhile, said the tests showed that Ireland has a drugs problem and that stronger Government action is needed to inform people about the dangers involved.
"The only way to tackle it is through education and trying to convince people that they don't need drugs and that they're not good for them," he said. "That's where this Government is failing."