Q:
  Assuming one has a good monitor and takes multiple readings throughout the day, the range of readings may well vary from the 120/80 region or below to 128/85 or above.  The range depends on time of day and medication period.   So what would a reasonable target range be?    Yes, I know the answer has to be “it depends on the patient”, but are there at least guidelines?

A:
 Blood pressure varies throughout the day.  It is not constant.  However your blood pressure should stay within the normal range.  Your blood pressure should be below 140/90 whenever you take a measurement. If you are getting a blood pressure reading consistently above 139/89, you need to talk to your doctor about changing your treatment. The change could be as simple as changing when you take your medication.