Also go buy a cheap pressure cuff and practice, though u have procrastinated badly.
take a deeep breathe which you hold for 20 seconds or so as if pooping, exhale and THEN activate the cuff.
Do this a bunch of times, timing is important.
Im pretty sure youre not taking this seriously, though, if u waited this long to ask.
Viagra or Cialis, who do u think they tell old guys on BP meds to avoid either of those?
Cuz BP under BOTH of those would be lowered quite drmatically.
So BONER PILLS, bro, about two hours before, and keep checking it with your own cuff in your car.
NO SALT, no talking, feet flat on floor, no moving, arrive very early.
During measurement imagine your FAVORITE calm place during early childhood.
PRACTICE, you idiot.