I hate donating a whole pint of blood. I wish it was possible to donate just a half pint at a time. In Japan they only do half pints. The last time I donated a whole pint I nearly passed out and had a reaction from too much blood loss. I got hot and sweaty and they had to give me ice packs. Part of this is because I'm on a beta blocker so it's more difficult for me. Does anyone have advice on how to convince a doctor to write a prescription for phlebotomies?