Monday was my dex day (down to 40mg once a week now). I was able to fall alseep at midnight, which was great! But I was awake at 3 am. This may have been due to two factors. Dex causes sleeplessnes and it also causes (in me) really severe indigestion. It’s known to cause ulcers in long term use. My friends are Xanax, Mylanta and OTC Zantac. Sometimes Alka-Seltzer helps, but I have to limit my use of aspirin products since I take some every day for blood thinning.