So chance1826, for your father's high blood pressure which is the general run-of-the-mill hypertension the positional blood pressure isn't really that important. It is in other scenarios. But what he needs to do is just check it daily (many pharmacies have blood pressure machines which aren't too bad in terms of accuracy) for a while. Write them down and take them into his physician at the next appointment. From that, his physician can decide if he needs medication. As stated, a single blood pressure reading in this type of case doesn't mean a whole lot.

