I posted the other day regarding hives from percocet...on and off, but bad at times. Today the doctor switched me to ultracet. After hanging up, I remembered having trouble in the past with it...I "think" stomach pains. I took the first one at 4:30 nearly two hours ago and I am starting to itch! No hives yet though. I have liquid benedryl on hand just in case. This is so frustrating! Does anyone else have trouble tolerating meds...if so what did you do?