You can take normal diet and there is nothing which is banned except alcohol.
There are four drugs in AKT4
and side effects are according to the different drugs like
may cause hepatitis
Isonex may cause hepatitis,neuropathy,agranulocytosis
Etambutol may cause optic neuritis
Pyrizinamide may cause hepatitis,arthralgia
In case of any side effects mentioned,you must contact your doctor.