Is 132/90 too high when you are taking blood pressure meds?

My nephew was told to take his B/P when he woke up in the morning. Needs to be taken "at rest". The average is 120/80 but I think age is a factor. My nephews dentist won't work on him if its above 140. This is really a question for your doctor.

With blood pressure there are so many variables. Even a person on meds can be affected by a short exertion. Walking up the stairs carrying laundry. Taking groceries from the car. Getting excited or mad. Hearing unsettling news. Bending over to pick up something off the floor. Age, weight, diet, health conditions. White coat syndrome. Endless reasons why a BP reading can be elevated.
Once I read that the proper way to take blood pressure is to sit still for at least five minutes in a quiet room before taking and then take the average of three readings. That never happens at a doctors office. Actually I think these instructions were to be used before making any changes to the meds.
My BP was up once at a doctors appointment. I was advised to keep a log for a couple of weeks to see what pattern emerged.
Ask the prescribing doctor what BP reading is expected with the current medication prescribed and what would be too high or low and what action to take.
My elderly aunts BP meds are adjusted based on her pulse rather than the BP reading. There are many variables to consider with each person.

It depends, call the doc.