Renal damage could occur due to long standing, uncontrolled hypertension
. The elevated urea and creatinine
levels suggest renal damage. As regards the medicines he is taking for Tuberculosis
(what part of he body has been affected by TB?), and the antibiotics that he is on (special attention to be paid) discussing this with his treating doctor, who might make changes in the medication as per the requirement is suggested
Considering his age too much enthusiastic treatment is not advised.
Reduce the intake of proteins
in his diet (pulses, legumes, non vegetarian food )
Reduce the intake of salt in food, along with papads, pickles, ketchups etc.,
The treating doctor would be the best person to guide you further regarding the medicines .