a patient who had undergone renal allograft transplantation 6months back on treatment with azathioprine and prednisolone conmes to the hospital with history of fevr night sweats cough and breathlessness on xray a cavity is seen in the right apical region along with classification.auramine rhodamine staining of sputum shows tubrcle bacilli and serum creatinine level 1.2mg % the treatment given is ?