hello there as dr.bijji said- good diet counselling
is must its true
As ur fathers sugars are not under good control you can start GLYCOMET
GP1 in the morning and night .Always remember give it 10 min before break fast and dinner. start Glucobay 25 just before break fast.
fasting should be always tiredness
is because of his high sugars.it disappear after it comes under control.
give him pan 40 for his acidity