Hello, My 87-year-old father s blood pressure this morning is 73 over 45. He takes Valsartan everyday but I did not give it to him today as I thought his blood pressure is too low that the pill will make his blood pressure even lower. Does he have hypotension? Is 45 too low? I keep a journal of his blood pressure reading everyday, but for the past week seems his blood pressure is very low with systolic below 90 and diastolic below 60. What should I do?