This is about the limit of what I can stand at the moment. If my blood pressure goes any lower than this then I really can’t cope. As long as it doesn’t drop too far below 180 systolic then whilst I feel a bit shaky I can usually overcome it. (Note also the high heart rate.)
I’m wondering as well if diet doesn’t play into this somehow. Last week I mainly ate salads for lunch, often with a little cheese and things didn’t feel too bad. However, on Friday in an effort to use up some bacon that I found in the fridge I had BLTs with spicy mayonnaise. Within about half an hour I felt as though I was really struggling.
My understanding is that after eating the body directs more blood flow to the gut whilst contracting arteries elsewhere and causing the heart to beat more strongly. How much blood is redirected seems to be dependent on what is being digested as far as I can see. Quite what the interplay is with drugs that restrict contraction of the arteries and limit the power of the heart I really don’t know. It doesn’t sound like a sensible situation to me, but my understanding could be completely wrong.