The health of Nadiya Savchenko, who went on hunger strike over a month ago, is satisfactory, her lawyer Mark Feygin said.

"My client is not eating any solid food. Nadia is getting glucose injections. She is also taking an organic mixture, which keeps her energy up. The same measures were taken the last time she went on hunger strike," Feygin told Interfax on Monday.

Feygin said Savchenko received broader medical assistance during her previous hunger strike in Moscow.

"She was given fully-fledged assistance in Moscow because there was a hospital there. But medical assistance is acceptable here, too. However, the measures that have been taken are temporary. They can't sustain a person for ever," Feygin said.

Savchenko has been held in Russian custody since July 2014 over her alleged role in the murder of Russian journalists in the east of Ukraine. She denies all the charges.

Savchenko went on hunger strike during a hearing in the Donetsk City Court on December 17. She said she was going on hunger strike until the end of the trial of her case. Her lawyers believe the sentence could be handed down in February.