Hi Devesh, Welcome to HCM! Thanks for posting your query. I am happy to address your questions. As with taking any prescription medicine, people receiving TB antibiotics may experience side effects, including orange saliva, urine or tears. Some people may experience more serious side effects like nausea, vomiting or dizziness. Others may experience blurred vision or abdominal pain. Still others may suffer from ringing in the ears or even hearing loss. Sore joints and numbness around the mouth, finger, or toes are other serious side effects that require immediate medical attention. Further side effects may include a fever that lasts for more than three days, jaundice, bleeding and bruising. Hope I have answered your query. If you have any further questions, I will be happy to help. Thanks