One cause of sudden-onset vertigo
During my last and final attempt to get my abysmal iron levels up with doses of 75-100 mg/day, I managed to bring upon myself a nice case of vertigo. (It also caused cystic acne.) After a week of the iron it was suddenly difficult to sit upright without vomiting, much less stand up. I considered going to the ER but the only other time I'd done that I had to wait four hours. By the time I got up the nerve to go, I felt well enough to cope. I stopped taking the iron, obviously, and the vertigo improved to manageable levels but still kept hitting me a few times a day. I also had dry eyes, which I had learned earlier was what happens when my vitamin A levels…