What if I am already on ART when I find out I have TB

If you are on dolutegravir-based ART you will need a double dose of dolutegravir to overcome the interaction with rifampicin. If you are on TLD FDC, you will need to add a dolutegravir 50mg dose 12 hours after taking TLD. So if you take your TLD in the morning, you will need to take your extra dolutegravir in the evening.