I'm so glad I found this forum. Occasionally, I've gotten lightheaded when standing, more from rising from a prone position than from sitting. This has gone on just occasionally as long as I remember, and I assume it's because my blood pressure runs low. It's gradually gotten more frequent, and last Friday I got really lightheaded and queasy after standing. I got clearheaded fairly quickly, but the queasiness lingered. I tried adding a little salt to some water, but it didn't help much. I then read on this forum that someone suggested Electro Mix. I got some at Whole Foods and felt so much better. I've had a packet a day since then, and most of those symptoms have gone away. Drinking this mix every day seems inexpensive and safe. I must be lucky: I don't have POTS because I don't feel my heart rate increase when I stand up. I'm hoping that drinking the electrolytes and adding a little more salt to my diet will be sufficient for what I assume is an effect from low blood pressure. Last week when I was having those episodes pretty frequently, my sleep was worse. Since going on the Electro Mix, I'm back to where I was. I don't know if my symptoms caused the poor sleep or it was just a coincidence.