Dear Mr Gupta,
Welcome to Health Care Magic
You have not said what exactly is the problem...
The medicines suggest possible Coronary Artery
The treatment is appropriate.
If in spite of this, he has symptoms as you say – he needs cardiac catheterisation / coronary angiography
with a view for possible intervention (angioplasty
That is the best solution and should be done as early as possible.
Delay may be dangerous.
See your cardiologist.
Wishing speedy recovery