The Palestinian detainee, Mohammed Allan, who entered a coma last Friday after being on hunger strike for more than two months against being detained without trial, was brought out of sedation in an Israeli hospital on Tuesday.
Allan vowed the Israeli authorities 24 hours to solve his case otherwise he will continue his fasting, one of his lawyers said.
"He would stop taking anything including vitamins and water," the lawyer said.
The condition of Allan has been closely monitored since if he died that may escalate up violence against Israel. Allan, who was arrested last November in the Israeli-occupied West Bank, has not been formally charged by Israel with any crime.
On Monday, at a hearing in Israel's Supreme Court on Allan's petition for unconditional release, the conutry's Justice Ministry said it would consider freeing him if he agreed to be exiled abroad for four years.
The proposal was rejected by his lawyer saying that Allan poses no security threat.
The court, urging the sides to negotiate, put another session for Wednesday.
Allan (31) has been sedated since Friday, after doctors said his condition had deteriorated sharply. He had been given medication intravenously at Barzilai hospital in southern Israel.
The hospital said Allan was weaned off a respirator and cut his sedation, and he was "conscious and communicating."
Allan instructed the medical staff to halt intravenous treatment, but later he agreed vitamins could be administered in the run-up to Wednesday's court hearing.
The Israeli government sees his hunger strike as a powerful challenge against "administrative detention," an Israeli policy that has drawn criticism from Palestinians and human rights groups. But Israel calls the “administrative detention” necessary for its national security.
Israel fears that Allan’s unconditional release would encourage several hundred other Palestinian political detainees to go on a hunger strike.
Israel's medical association has ordered doctors not to abide by a new law issued by the Knesset that could enable them to force-feed a hunger-striker.