Sinn Féin plan to table a motion of no confidence in Health Minister Simon Harris.
The party says his position is untenable because of his handling of the National Children's Hospital overruns.
This morning Sinn Féin confirmed it will push a motion of no confidence in Health Minister Simon Harris.
It calls for the Minister to immediately resign his position after his handling of the overruns at the National Children's Hospital.
Last week it emerged Minister Harris knew in August of potential overruns of hundreds of millions of euro.
But he did not tell his government colleagues until he had a final figure in November.
Sinn Féin say Minister Harris misled the Dáil, the government and the public by delaying.
But the motion looks likely to fail at the moment.
Fianna Fáil say they will not support it as doing so would break the confidence and supply agreement.
The party's health spokesperson Stephen Donnelly said they cannot collapse the government now in the teeth of Brexit negotiations.
"We have to call out Sinn Féin for what they're doing because it is reckless," said Deputy Donnelly.
"Sinn Féin are actually suggesting - 46 days out from a potential no deal Brexit and all of the consequences for our island and peace on this island and prosperity on this island - Sinn Féin are actually saying let's collapse the Irish government and leave Ireland completely exposed."
Party Leader Mary-Lou McDonald dismissed the suggestions that the move is reckless.
"The reckless thing is to allow a minister to withhold information from cabinet, from the Dáil and from the people
"The reckless thing is to allow a situation where huge amounts of taxpayers' money can be overspent, can be mismanaged and there is nobody accountable."
Sinn Féin don't have Dáil time until Wednesday February 20th, and the motion will be moved then.
