"If this is done too quickly, if this is done too aggressively, this will be counterproductive and will make banks not more healthy but less healthy," Padoan told Reuters at the World Economic Forum in Davos, Switzerland.

The ECB aims to publish by March a draft of new measures targeting a huge pile of unpaid loans weighing down euro zone banks and causing particular headaches in Italy, home to a quarter of the currency bloc's soured debt.

Padoan said he hoped the regulator's next moves will take into account "the impact on market climate, so that there is no counterproductive reaction from the market side".

(Reporting by Silvia Aloisi, writing by Isla Binnie)