Yes, for me it was a matter of a few days, it can definitely be that quick. The first time I was on Entocort, I tapered from 9 mg to 6 mg and felt pretty miserable rather quickly. Went back up to 9 mg for another few weeks and then was able to successfully taper to 6 mg. That was at my GI's instructions - apparently that's pretty common, sometimes you just need to be at the higher dose for a bit longer to get everything healed a little more before your body is ready to go to a lower dose. So, call your doctor and let them know what's happening and ask if it's okay to go up to 9 mg for a bit longer. Your doctor should hopefully be fine with that - they don't want you to suffer. Good luck and feel better!