I took one pill on April 19th - the next day I noticed that it felt like someone was stretching a giant rubberband accross my back. I stopped taking it and felt ok, not great, but okay until May 18th when my muscles and tendons started to ache/hurt. I also noticed that my vision is not as good as it used to be and things that I pick-up seam heavier. I feel like a wreck. I also have anxiety due to this, not sure if it is directly from the med or not. Also, I am urinating very frequently - which is very strange for me. I find that if I eat a lot of protein it helps the fatigue and muscle pains. This is driving me crazy - I was almost crying today at work. Let me know how you are doing I want to know how long it lasts too. Some of these people seem to have long-term symptoms. I truly hope that you are feeling better.