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?

 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.