I was diagnosed with PA 12 years ago, but had the terrible fatigue and other symptoms for 10 years before that. I get B12 injections every two weeks, and that mostly works OK, although some symptoms will never go away.
Then two years ago I had another frightening downturn in health. I steadily lost my ability to keep my balance and to walk normally. After two months, I had to use a cane and moved very slowly. The fatigue was horrible, headaches were a constant, and I developed double vision. I could only lift my left leg to get out of a car by lifting it up with my hands and moving it out. I had trouble thinking clearly. This downward spiral continued for 9 months, and then, all at once it reversed, as quickly as it had arrived.
The only thing that had been different in my life 9 months before was a root canal with the use of novacaine and nitrous oxide. The root canal took 2.5 hours because of an emergency patient arriving. Two weeks after this root canal, I awoke with a splitting headache and double vision, and everything went downhill. My doctor ordered tests, there were two MRIs, a neuro consult, and neuro testing, but no cause was determined. Could all that Nitrous have depleted B12 to the point that it took months to catch back up?
Sorry to be so long winded. If you stuck with me...Thanks!