Talk to Orthopedic Surgeon on Low Blood Pressure

My husband complaining about low b.p from two weeks like batha batha chakar Ana or shivering hona after eating something he is ok his sugar levels are normal (109) we don't check his b.p and usually he do breakfast at 10:am and then directly dinner at 8:00 pm. No other medical history Alhamdulillah but usage of mobile is to much kindly suggest something plz and yes recently he is start seacal(blue) and calsan d and for acidity he take risek sachet 2 in a day