As per your fathers brief history he is having aneurysm
, aneurysm is a balloon like structure that can’t tolerate high blood pressure
, his blood pressure must be 140/85 or bellow, so treatment of BP must be modified.
Reasons of disorientation
Tabs feliz, pacitane – consult with your doctor
Metabolic reasons – do serum sodium and potassium
Age related changes – MRI
brain will be helpful if you don’t have recent.
My best wishes to you
DR VS MAAN