I have a problem with giving blood. I have no usable viens due to chemotherapy years ago. I need very thin butterfly needles used when I give blood. Red Cross told me they had to use a full needle due to volume.
I used to have issues giving blood due to my cancer/chemo experience...I'd get severe anxiety and pass out every time I had blood tests. I've gotten a lot better. However, someone poking around with a full sized needle would probably cause me to throw up, sweat profusely, pass out and generally have a very bad time of things even IF they could get a full sized needle in.
As I recall it was 51+. My BP was effected...it went VERY high. I have a thread on here about that.