Thank you for posting your question here, I will try to answer it to the best of my abilities.
Yes, the orange coloured urine
is a result of the medication you are taking.
For a TB patient, it is recommended to eat a balanced diet, but to increase the intake of fruits and vegetables (strawberries, custard apples, spinach, green leafy vegetables, legumes such as dhals).
You can also increase the intake of fruit juice and tea, preferably green tea as it contains a larger number of anti oxidants.
I hope this answered your question.