A general comment:
Be very careful changing blood pressure medications. Anyone over 60 years old should own a blood pressure cuff and know how to use it. If you have any question about your blood pressure read your pressure daily and write it down, especially if you have changed your medication. Blood pressure is not something to play around with.

A middle-aged friend decided she could treat her blood pressure with vitamin supplements and stopped taking her meds. She had a serious stroke and spent the last years of her life in a wheelchair and with serious cognitive losses, finally killing herself in a horrible accident while her caretaker had gone out for food.