At least one person has been killed in the protests.
A spokesman for the Tunisian interior ministry, Khalifa Chibani, said: "The protests have decline and there was no vandalism or destruction last night, but the police arrested 150 individuals involved in acts of vandalism and rioting committed in the past few days".
Hundreds of Tunisians took to the streets of the capital and the coastal city of Sfax on Friday, waving yellow cards and demanding that the government reverse austerity measures.
The government has failed to resolve the issues of poverty and unemployment since the Arab Spring uprisings which began in Tunisia in 2011 and spread across the Middle East.
More than 200 people were arrested and dozens hurt during clashes in several parts of Tunisia, the interior ministry said Wednesday, after a second night of unrest driven by anger over austerity measures.
Almost a week of sometimes violent protests across the country followed the announcement of austerity measures in this year's budget, which took effect on January 1.
Rights group Amnesty International accused the authorities of using "increasingly heavy-handed methods to disperse rallies and subsequently arrest protesters" during the unrest. Fire bombs were thrown at two Jewish schools on the island of Djerba, damaging the exteriors but not the insides.
The government has blamed the opposition bloc and protesters accusing them of causing unrest and violence. Prices have increased for fuel and some consumer goods, while taxes on cars and other items have also gone up. But the economy has struggled and people are angry over the government's latest austerity measures.
The country has been hailed for its relatively smooth democratic transition but seven years after the revolution tensions over economic grievances are high.
The North African nation, however, has had nine governments since the overthrow of its longtime dictator in 2011. The economy worsened since a vital tourism sector was almost wiped out by a wave of deadly militant attacks in 2015, and has yet to recover despite improved security.