Sinn Fein has tabled a motion of no confidence in Tanaiste Leo Varadkar.
The party claims he has not yet put forward a credible reason for giving a confidential GP contract to a friend of his in the now-defunct National Association of General Practitioners.
Tánaiste Varadkar spent two hours in the Dáil defending himself on Tuesday.
He said the contents of the IMO contract were very much in the public domain by the time he gave a copy of the deal to his friend Dr Maitiu O Tuathail, who at that time headed a rival doctors union.
Both Fianna Fáil and the Green Party have publicly backed Leo Varadkar's position.
Following Sinn Fein's no-confidence motion a spokesperson for the Tánaiste accused the party of only being interested in political mudslinging at a time of national crisis.
The Dáil will debate the motion on Tuesday.
However, Taoiseach Micheál Martin believes the issue has been comprehensively dealt with, saying "he has apologised for any error of judgement on his behalf."
The Taoiseach added "I have said it was the wrong thing to do, the wrong way to do things, it was not best practice. He has apologised in the Dail for that error of judgement. There has been a very comprehensive presentation to the Dail this week on it."
*Reporting by Sean Defoe