<s>[INST] My father sufferring from TB. His age is 71. Doctor started my father with R cinex 540 mg, Combutol 800 mg and PZA- CIBA 1000 mg tablets.Its fours days now my father feels very weak, lot of pain in joins and dizziness. Is it a side effect or body requires some time to settle with tablets [/INST] Dear Friend. Welcome to Chat Doctor. I am Chat Doctor.  I have read your query in detail. Furthermore, I understand your concern.First I would like to know, TB of which part of body is he suffering from. These Anti-tubercular Chat Doctor. I would like to know that was he prescribed Pyridoxine? Also get his Liver Function Test and Serum Uric Acid levels. Review with reports. This is my best advice for you based on available details. If you have any further query please ask me. Stay Healthy. ChatDoctor, MD </s>