Don't come into this sub-forum often which is why I've only just stumbled on this. Hope the following might give you some peace of mind although remember we are all different and our bodies work in different ways. This is my short story. Until early this year, I had raging hypertension for at least 5 years e.g. with some readings around 180/80 and some much higher. Until this year, I chose to ignore it and carried on riding. Since, february I have been taking medication and it seems to have stabilised in the 'high-normal' region. The medics seem happy with this. I never felt my high BP was a contributory factor so always carried on riding. In my instance, it seems that high BP is, sadly, in my genetic make up, there is nothing I can do about it.
If you want any further details, carry on asking.
And as an aside, if you are prescribed meds and you visit europe at all, buy them from any pharmacy. Amlodipine (which must be similar to
@deptfordmarmoset's Felodipine) costs only €2.50 in spain and €4.90 in france, less than half of the £8.20 in the uk!!