text: Drug potassium found in this post: Facial Numbness, Tingling and Twitching? : Fibromyalgia board
  Drug List > Health Message Boards > potassium > Facial Numbness, Tingling and Twitching?
  Quote from ArtsyAthlete:
  :wave: Well, I'm also having the same problem, and it has turned out I have low potassium. Has your doctor checked you for low potassium? Are you taking a diurectic or BP medication? Once I was put on potassium the weird sensations stopped...that is until yesterday when I had an episode, again. Are the weird sensations followed by fatigue, weakness, leg cramps and just plain very tight muscles? You need to tell you doctor, if you haven't already. We can't blame everything on FMS.
  Take care, Des[CENTER][/CENTER]:angel:
  Des, you definitely hit on something there. I seem to have chronic low potassium. The first time I've been tested (last fall) my serum potassium was 3.4 mEq/L. The lab range is 3.5 - 5.5 mEq/L. I took prescription potassium supplements for a month and then forgot to get tested afterwards. About two months ago, I had another CBC and guess what -- this time it was 3.2 mEq/L. I have not been very good about taking my supplements religiously. I am supposed to take them twice a day but it is really hard to time this because I cannot take any supplements with my thyroid medication, which I take in the morning. I will try to do better about taking my supplements and I will be sure to get retested. Thank you for much for this advice -- I believe you definitely had something there. :) Smarty pants. :)
  EDIT: I recently read that many fibromites have unexplained or "idiopathic" hypokalemia. In my case, I do not take diuretics or any BP medications and my doctor has no explanation for my hypokalemia. In fact, I am also quite often troubled by idiopathic postural hypotension (near passing-out upon standing) and my blood pressure overall is low-normal. I make great efforts to stay well-hydrated -- drink a gallon+ of water daily. I do have some caffeine intake from my usual morning latte and the occasional green tea in the afternoon. The postural hypotension gets much worse prior to that time of the month... At any rate, overall, I do have leg cramps that just come and go for no apparent reason, fatigue, and overall muscle tightness. My PT just doesn't get why nothing helps to relieve this crazy muscle spasm. :) Hypokalemia, I guess! I will be good about taking my supplements from now on and see if this helps.