I have been on aspirin for the past 20 yrs just because, my family has heart problems so I just started taking it myself which I guess turned out to be a good choice. I have ET??? The Dr never did anything but blood labs. I worked in phlebotomy, lab and EKGs and this jerk doesn't want you to understand anything except to just listen to him! HU might be good for many people but a lot of people can't handle different meds. My PCP said the same thing because we all have different tolerance. Three of my other Drs hate HU and all said the med is making me sick. I was always afraid to go off of it but just couldn't handle it anymore plus still feel really bad almost like withdrawals or something. I just pray for the next Dr to be understanding and is more thorough with tests than this other guy. Take care and I hope all works out for you.