I had an aortic heart valve transplant and before that, my B/P was normal, but since the transplant, my blood pressure is running on the high side?

I had an aortic heart valve transplant and before that, my B/P was normal, but since the transplant, my blood pressure is running on the high side…So my heart Doctor changed me from 20 mgs. of lisiinipril to 40 mgs P/day…It doesn’t seem to have helped that much soo I wondered if, by me taking 20 mgs, in the AM and 20 mgs in the PM would not be good enough and that I should take the 40 mgs. alll at once in the AM?…Would that make a difference? My heart Doctor is on vacation so, thought I would ask you folks what you think…

Age:87
Female
Medications:40 mgs. Lisinipril p/day,, 2 carvedilol at 3.125mg p/day, 1 clopidogrel 75 mgs. p/day and 1 pantoprazole SOD 40 mg. p/day