My sister was diagnosed with abdominal tuberculosis and she's on ATT for 2 months. Currently she's on modified ATT with Rifampin 450, Isoniazid 300, Ethambutol 600 and Moxifloxacin 400. Her body temperature when checked orally is 97.8 - 98.8 till 9pm. At around 9pm everyday, her temperature is 99.6 or 99.8 but not more than 99.8. But she don't feel like having fever. Then at 11pm it changes to around 98.8. Before she had isoniazid induced fever as told by doctor at about 102 - 103 F. But that was cured before two weeks. I've heard that normally body temperature rises in night. But I'm not sure. Please tell if 99.6 at that particular time is normal. Thank you.