, have taken thyroid medication since I was 12, have
high blood pressure. For years I will occassionally get these mild blackout spells. I don't completely blackout, but things go sort of gray, I get a tingling in my right arm, my body feels weak and heavy, I get heartburn or stomach pain with these. Taking one Aspirin helps. My blood pressure sometimes is high and sometimes is low when these "spells" come on. They do see to happen more when I am under stress or worrying.