Charlie Rowley, 45, was discharged from Salisbury district hospital nearly three weeks after he and his partner, Dawn Sturgess, collapsed at his flat in Amesbury after coming into contact with novichok.
The incident happened in the town of Amesbury close to Salisbury where Russian double agent Sergei Skripal and his daughter Yulia were attacked with the same substance in March.
Sturgess passed away at Salisbury District Hospital on earlier this month.
It is unclear where Rowley found the bottle, or whether it contained the same batch of nerve agent used on the Skripals.
As it turned out, while walking down the street Rowley and Sturgess found a bottle, which they thought was perfume.
Scotland Yard said last night: "We have been talking to Mr Rowley in hospital and we will of course be talking to him now he has been discharged".
"Today is a very welcome milestone in his recovery and all of us here at Salisbury Hospital wish him well as he continues to get better".
Charlie Rowley, left, regained consciousness Tuesday after being exposed to the deadly nerve agent Novichok.
Ms Sturgess, 44, died in the hospital on July 8.
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"We have seen a small but significant improvement in the condition of Charlie Rowley".
Government departments and the Metropolitan Police, whose counter-terrorism unit is investigating the poisoning, refused to comment on the report when contacted by AFP.
The UK government has blamed Russian Federation for the incident, but the country's authorities deny any involvement.
Ridley, the coroner, said samples taken from both Sturgess and Rowley tested positive for Novichok at Britain's defence research labs.
Charlie was admitted to Salisbury District Hospital on Saturday June 30th, following exposure to the nerve agent, novichok.
The Director of Nursing, Lorna Wilkinson, also said staff have "decontaminated" Charlie, with Public Health England advising that "he poses no risk to the community".
Jack Taylor/Getty ImagesEmergency workers in protective suits search around John Baker House Sanctuary Supported Living after a major incident was declared when a man and woman were exposed to the Novichok nerve agent on July 6, 2018 in Salisbury, England.
Britain and its allies blamed Russia for the attack in March on the Skripals, prompting the biggest Western expulsion of Russian diplomats since the Cold War.