I don't know; at the time, I generally had high blood pressure, and I don't know anything about what might cause it to raise/lower in the short-term (obviously

I don't know; at the time, I generally had high blood pressure, and I don't know anything about what might cause it to raise/lower in the short-term (obviously losing blood would, but I dunno if a controlled, intentional blood-drawing for a donation would be enough)