Ask your doctor. My GI doctor was very reluctant to put me on xanax but while flaring I get extremely anxious. I have no idea whether the flare causes the anxiety or the anxiety contributes to the flare. I suppose a little of both. He only prescribed me 0.5 mgm and the bottle contains 40 pills with a strict NO REFILL on the bottle. Maybe your family physician would be more willing to give you a script for valium.
By the way...I also am on 100 mgm of 6MP and today decreased my prednisone from 40 mgm to 35 mgm...weekly decreases by 5mgm. Also taking Cort enemas and Canasa suppositories, Colazal (nine pills a day). Are you feeling any better? I do believe this high dose of 6MP is making me feel extremely fatigued but yet I cannot sleep without the Ambien CR....ugh....bummer.