The measures passed with 175 votes in favour, 33 against and 141 abstentions.

"These measures are designed to protect our productive sectors and the most vulnerable people," Socialist Prime Minister Pedro Sanchez said last week when he unveiled the plan.

The measures include cuts to value-added tax on gas and fuel expected to reduce pump prices by as much as 0.3 euros per litre, or roughly 20 euros per tank for the average car.

Additional support includes a direct subsidy of 0.2 euros per litre of fuel for transport operators, farmers, ranchers and fishermen, along with lower electricity taxes.

Gasoline prices in Spain surged from 1.5 euros per litre on February 28, when the US-Israeli bombings against Iran began, to 1.8 euros per litre over the weekend.

Sanchez defiantly refused to let US troops use its bases to attack Iran at the start of the conflict, a move that drew sharp criticism from US President Donald Trump.

"Every bomb that falls in the Middle East eventually hits, as we are already seeing, the wallets of our families," Sanchez told parliament Wednesday.

The European Union's fourth-largest economy has in recent years registered growth rates far higher than its peers, notably thanks to domestic consumption, tourism and exports.

But officials fear that the conflict could dampen growth.