@boomermeg thank you for information about dehydration. Although I feel I'm hydrated ,I will certainly increase my intake. My blood pressure does fluctuate so I'll monitor it more closely. It does make me feel better knowing I'm not alone. Again thank you and good luck on your journey.

@boomermeg If drinking more water helps, the sensation is more likely due to low blood pressure. My prednisone withdrawal threw me into secondary adrenal insufficiency, and when it first hit really hard, I was so dizzy and off balance I could barely walk. I’m in my 70’s, too, and an older friend and retired physician told me it was probably a UTI, and I then remembered learning in gerontology that UTIs in older adults can manifest like that. While waiting for test results, I hydrated like crazy and got much much better, although the worst was actually when I came home from the clinic. I stood in line at the bakery and then started walking home when all of a sudden my legs felt like logs and I almost fainted. I recognized it as hypotension from my years of caring for my husband. Now I make sure I drink a lot of water, not so much that I overly hydrate. And my rheumatologist agreed that I should stop my high blood pressure medicine (which in my case was prescribed as a precaution because of white coat anxiety making an accurate read impossible. That’s another story.)