One MP's dramatic health scare interrupted an all-night debate in Victoria's Parliament on controversial voluntary euthanasia laws that descended into "belligerent, professional obstruction".

The upper house was in a protracted debate when paramedics were called to Parliament to treat MP Daniel Mulino​ after he reportedly collapsed in his office. Parliament was briefly suspended until MPs received confirmation that Mr Mulino, who hs been opposed to the bill, was fine, responding to treatment and in good spirits.

The upper house had discussed only nine of 141 clauses in the bill and then adjourned Parliament about midday on Friday until Tuesday morning.

Opponents of the voluntary euthanasia laws on Thursday shouted abuse across the chamber over the government's attempt to bring on a vote on clause one, including the term "Nazi".