Ex-Russian Prime Minister Yegor Gaidar has left hospital in Moscow following a mystery illness, a spokesman has said.
Mr Gaidar was rushed to intensive care after collapsing in Dublin
Doctors have yet to reveal their diagnosis, but have said his internal organs suffered "radical changes".
Doctors in Ireland, where Mr Gaidar first fell ill, had already said he did not have radiation poisoning.
Last week, Mr Gaidar's daughter said she suspected his illness was linked to the fatal radiation poisoning of the former KGB spy Alexander Litvinenko.
Mr Gaidar, a 50-year-old economist, served as Russia's prime minister under Boris Yeltsin following the break-up of the Soviet Union.
Although Irish doctors ruled out radiation poisoning, there was no indication of why his health deteriorated so rapidly.
He fell ill a day after Mr Litvinenko died in London after being poisoned with the radioactive element polonium-210.
Mr Gaidar's daughter, Maria, quickly made the connection and claimed her father had been poisoned by people seeking to destabilise Russia.
When pushed to define who she meant, she said elements within the Russian security services and opponents of the government who were now living in exile abroad.