urticaria
"Had chronic urticaria 3 years ago, tried everything from Benadryl, Zyrtec, Claritin and nothing worked. Took a Allegra 24 hour and 70% of my hives have disappeared leaving me less itchy. Wish I would've found out about this site earlier to do my research. This is my first day on the medication, hopefully it will go away after this week."