Doctors had to respond quickly to check on the anti-war protester who had been detained after a bomb murdered a blogger who supported Vladimir Putin.
After propagandist Vladlen Tatarsky was killed in an explosion at a café in St. Petersburg on Sunday afternoon, Daria Trepova, 26, was taken in.
She was sent to Moscow, where she reportedly underwent nine hours of questioning.
According to Russian television station Ren TV, the anti-war activist “complained of feeling poorly, adding that she could not hear well and could not gain her bearings.”
Presenters said: ‘Medics were called in to examine and assist Daria.
‘According to preliminary reports, the woman’s condition may have been caused by concussion as a result of the blast.’
Daria has admitted giving a statuette to Tatarsky but did not know what was inside it.

She apparently told investigators: ‘I was set up. I was just being used.’
The former art student had previously been detained for participating in a rally against the war on February 24, last year and she spent 10 days in jail at the time.
Yevgeny Prigozhin, the restaurateur and mercenary chief who heads the Wagner Group military contractor spearheading Moscow’s offensive in eastern Ukraine, said he owned the café and allowed patriotic groups to use it for meetings.
He said he doubts the involvement of Ukrainian authorities in the bombing, and said it was likely launched by a ‘group of radicals’ unrelated to the government in Kyiv.
However, Progozhin was swiftly contradicted by Putin’s spokesman Dmitry Peskov, who blamed Kyiv for the attack, who blamed Kyiv for the attack and said the bombing justified the ‘special military operation’ in Ukraine.
At a press conference on Monday, Peskov said: ‘Russia has faced the Kyiv regime, which has supported terrorist activities.
‘That is why the special military operation is being conducted.’
Ukrainian President Volodomyr Zelensky meanwhile brushed off the attack while speaking to reporters.
‘I don’t think about what is happening in St Petersburg or Moscow. Russia should think about this. I am thinking about our country,’ he told journalists.