bit late, but yes I feel bit weak for a day and I take it relatively easy for about a week.

My BP is on the low side, and heart rate is pretty darn low, so lots of times, I have to convince them that this is my normal. I used to be on the lower weight limit way back when but now I'm fat, they are okay with it.

I drink lot of fresh orange juice and eat lot of dark green veggies after donating blood. Along with bad stuff like donuts and other sweets. It seems to help with recovery.

Oh I also am careful about getting up out of the bed or standing up from a chair. Avoid the dizzy spell.