Speaking in an interview with his group's Al-Manar television, Nasrallah that consultations among Hezbollah's political allies were drawing to a close and they would release a statement shortly that spelled out the steps to be taken.
"I believe this action will be effective, very important and very big," he said. He would divulge the plan but urged all Lebanese to support it.
Hezbollah and its allies have staged street protests and sit-ins, camping outside the prime minister's office, since Dec. 1 in a bid to topple the government of Fuad Saniora.
Newspapers have said if Hezbollah steps up the campaign, it is likely to employ tactics such as a general strike and the blocking of major roads. When asked if the opposition would close roads, Beirut port or airport, Nasrallah declined to respond.Click here for more news from the Middle East.