Thirst, dizziness, palps
Hi Maxine and anyone else interested,
First, Maxine, have you thought about using the cartoon Maxine as your Avatar? I LOVE her and if I were you, that is what I would do. She is a hoot!
Back to business.....most people with this problem are thirstier than normal. I ran an FMS/CFS support group for ten years, and people always came to group with their giant drink cups or bottles of water. Most said they took them with them everywhere.
However, knowing how doctors depend on lab results to protect them from malpractice suits that might result from clinical diagnosis, I doubt that anyone would be diagnosed with diabetes insipidus just because they are thirsty and peeing a lot. You would need abnormal electrolytes on basic labs just to get most docs to test you for D.I., the exception being LLMD's, who almost always test for this, IME. Then your ADH test would have to be abnormal.
As far as dizziness is concerned, being dehydrated can certainly cause that, and it may also cause your head to pound when you stand up. I've had it get so bad, that when I stood, my head would pound hard enough that my hearing would disapper on each downbeat of my heart. My hearing would litearlly go in and out with my heart beat until I got used to being upright. That clued me in to go drink an entire glass of H20 right away.
But, in CFS, the usual cause of dizziness, IMO, is some form of orthostatic hypotension. This is due to that pesky autonomic nervous sytem being out of whack once again. Thirst can figure in this, because low blood volume is a factor in causing it, and you need to drink more when your blood volume is low. If you have been diagnosed with an MVP (mitral valve prolapse), you can take it to the bank that your blood volume is too low, so drink up! Other common types of orthostatic hypotension are POTS (postural orthostatic tachycardia syndrome) and NMH (neurally mediated hypotension). In the first case your heart beat speeds up too much when you stand (tachycardia), often in an attempt to get blood to your brain. In the second case, your systolic (the top number) blood pressure fails to rise like it should when you stand, and often falls. The degree of the fall is considered (along with the pupil test) to be a good indicator of adrenal fatigue. For eample, mine falls as much as 50 pts. when I stand, whereas in a normal person, it should go up 10 pts. That indicates severe adrenal fatigue, and the only reason I don't pass out is that I start out with blood pressure that is too high, so it only falls to normal. Most of you probably know all this stuff already.
Magnesium definitely helps with palpitations and it helps prevent dangerous arterial spasms as well, a hazard esp. in cold weather. If you have an MVP, I would consider magnesium and plenty of H20 to be essential. It also helps with constiptation, so if you have the opposite problem, choose the citrate form not the oxide form....you can take less since it is better absorbed, and it does not cause diarrhea as badly.
Disclaimer: I am not a doctor, just a long tem patient like all of you who studied Naturopathy for a couple of years and worked in a hospital for many years before this crud knocked me out of the work force.
klutzo
ETA: Sushi - sorry I repeated some of your info. You were posting while I was typing mine! Rich's info is much more scientifically oriented as befitting his research status...so go with what he said if it conflicts with what I posted.