Thanks for your question.
Probably it is a case of primary hypertension
that means there are no cause of this hypertension.
First of all you have to check other parameters like blood sugar,lipid profile
,ECG to see if there is any abnormality in them.
Then you should understand that there are no cure of primary hypertension.your blood pressure is controlled due to medication and if you not control your BP there are lots of complication that can arise so please do continue your medication prescribed by your doctor life long and should followup your doctor at lest once a month to know the status of your BP.