HI.
It looks that your friend is a diagnosed case of 
abdominal tuberculosis. 
Since the dose of 
AKT3 or 
AKT4 is causing pain in abdomen, it is possible that a particular medicine in this combination.
I usually advise my patient to take the Rifampicine, Isoniazide, 
Ethambutol and Pyrizinamide in a separate preparation at different timings, Rifampicine to be taken on empty stomach.
Once all the ingredients are taken at different times , it becomes easy to know which medicines is causing the problems, and we can stop that particular component. 
If required that particular medicines is stopped and Streptomycine injection and / or Levofloaxacin. 
You treating Doctor knows the best. 
I hope this will solve the problem and ATT has to be continues in whichever form it suits .
He has to take 2 + 4 months treatment. 
High protein diet.
Multivitamins,