Kira injects BITE ZA DUSTO into a person . If said person reveals that Kira is , well , Kira , the person they say this to or the paper they write it down on goes Kaboom . With the kaboom , time goes back an hour so the paper will still be there or the person they saw explode won ' t be , ya know , exploded , and the person who was injected and Kira ? remembers everything . I think . I ' m only watching the anime , so I might have some details wring here , but that ' s how I think ti works . <| sep |> It is unacceptable and dangerous that Tramadol was prescribed if he has a known recorded allergy to it , so he should make a formal complaint about this . If he is in a declining state , has failing kidneys and has unexplained seizures he should go to an AE department and will likely be admitted to hospital where this can be sorted out . If the long term medication is unlicensed he may have some difficulty getting it prescribed , but he shouldn ' t be left without alternative licensed treatment during this time .