- Summary- Jailed Kremlin critic says his back pain is worsening- Navalny says he's being injected with unknown drugsDec 26 (Reuters) - Jailed Russian opposition politician Alexei Navalny said on Monday he was suffering worsening back pain from long spells in solitary confinement that he said were part of a deliberate strategy by the authorities to undermine his health.In a post on Twitter, he also complained of being injected with unknown drugs."If you lock a person up in a punishment cell, where he can either stand or sit on an iron stool for 16 hours a day, after a month in such conditions even a healthy person will undoubtedly get back pains.When a doctor finally came, he said, she examined him for just five minutes and refused to tell him her diagnosis or what she was prescribing.The Twitter post included images from Navalny's medical records, which he said had been released to him a month after he asked to see them."