It is real alright. I've stopped my BP medication for two days now whilst taking readings two or three times a day. It is currently back up to the 100 - 110 range.
Trouble is it will eventually go over 200 if I don't take the medication
Over the past 10 years the doc has tried 3 entirely different types of med. The present one, Amlodipino, is the least dramatic.

@Petter I am on Amlodipino/Amolodipine (UK generic drug name I guess) too. It is about the 6th blood pressure med my doctor has tried me on and so far is the only one that has not turned me in to a zombie. I fin that if I split a 10 mg tablet in to 2 and take half on a morning and half before bed the side effects are minimal.
Hope this is of some encouragement.

@LenHazell53 It is indeed, Len. Thanks.
(Amlodipino is the generic name used in Spain.)
My tablets are 5mg and too small to split. So I stop taling them for two or three days when my pressire starts dropping below 100. I have skipped two so far and my BP is back up to 116/61
I shall skip one more dose before resuming them.
The reason it went so low this time is that I was travelling and didn't check it for a fortnight. (It had been really stable in the 115 to 130 range during the previous fortnight.)

I am well aware, thanks. That's why I carry a meter with me on my travels.
(I'm currently in Italy, after a month in England)

My doc knows alright!! She has put me on fifferent doses of 3 different types of medication over the years. The cutrent one is less erratic than the previous ones, but still has to be watched, and halted, every now and then.