Can you stop medicines for high blood pressure?

A lady patient came for consultation. I saw her file and the list of medicines she is taking. There were in all 11 medicines. Two of them for high blood pressure.

She was taking these anti hypertensives for nearly 20 years,
and regularly visiting the doctor who prescribed them.
At every follow up visit that doctor said only one word "continue"

I took her blood pressure. It was 130/ 70.
I told her to stop these two medicines for some time. She refused. "How can I stop?  it may increase" 

I explained to her that blood pressure will not rise suddenly. It may take at least 3 weeks to rise. You can monitor it at home with the instrument once in a week. If there is a rise within 3 weeks we can restart the treatment.

The arm should be resting on the pillow and cuff should be at the level of the heart 

The lady agreed and discontinued her two medicines. She monitored her blood pressure every week for the next 4 weeks. The blood pressure did not rise.

She felt confident but still was in doubt " what if it increases after 3 moths or 6 months?"  

I said " Please continue to monitor once a week. No need to worry"
. 
Six months have passed and her pressure is still normal

P.S.:

Millions of patients are taking treatment for many years. Doctors are not interested in a review in their busy practice.

Patients are also not keen for a review because they have been told:

"Treatment of high blood pressure is life long"

Not necessarily.