Dr Rula al-Saffar, former head of emergency medicine at Salmanya hospital, had her conviction and 15 year jail sentence quashed today by the High Criminal Court of Appeal.
The Bahraini medic had been sentenced in September 2011, having been accused of helping last year's uprising against the ruling royal family.
She is one of nine medical staff to have had their convictions cleared.
More top news
Voters in some of Britain's most scenic towns and villages share what matters most to them in the countdown to the June 8 national poll.
Police investigating the 2015 general election expenses of Craig Mackinlay have submitted a file to prosecutors.
Oscar-winning Jonathan Demme, who also directed hit drama Philadelphia, died of cancer complications.