I am almost 8 years post Tx and have dizzy spells, quite often, when I go from laying down or sitting to standing. I have checked my BP freqently, when this happens, it drops considerably. This kind of issue is fairly normal but could be symptomatic of other medical conditions, such as diabetes, so you should discuss this with your doctor, just to rule those out.

Since Tx, my BP has been all over the map, as high as 170/119 to 63/49. My doctors don't seem very concerned (except for the high BP- they ordered me to repeat the BP test at their office).