Soldiers fired rubber bullets and live rounds in the air to disperse hundreds of protesters trying to march to the presidential palace during an anti-government demonstration.
Prime Minister Hassan Diab accuses rivals of mounting a "coup" against his government as currency crisis deepens.
Lebanon is in the grip of its worst economic turmoil in decades and holding talks with the International Monetary Fund to secure billions in aid.
The policy of relying too much on debt to fund the budget has created problems for the young government of Prime Minister Hassan Diab.
The initial rallies last year were sparked by a raft of new taxes, and quickly morphed into a street movement calling for a full overhaul of the political class.
The central bank proposed Lebanese holders of Eurobonds due in 2020 swap their holdings for longer-dated notes, a move that could ease pressure on dwindling foreign currency reserves amid a deep financial crisis.
The halt in protests was also partly due to the holidays followed by soaring regional tensions between the US and Iran that eclipsed the protesters in Lebanon and Iraq demanding sweeping political change.
As sectarian political networks have been maneuvering to undermine anti-sectarian demonstrations, the country's political elite is likely to remain a dominant force.
The protest movement forced the resignation of prime minister Saad Hariri on October 29 and official talks to name his replacement are to start on Monday.
The former leader stood down in the face of mass protests but his name is once again in the line up to take up the prime minister’s office.
Demonstrators in capital Beirut protest against capital control measures taken by the Lebanese banks while the country pays back $1.5 billion Eurobond as unrest completes 43 days.
Protesters vowed to prevent the session and demand politicians to listen to the people instead.
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