urticaria
"I've had hives 4 times now.  The last time they lasted 1 entire year.  Nothing worked.  My allergist said that the doctors had failed miserably at keeping me comfortable during my ordeal.  I tried Zertec this time.  My hives are totally gone.  My skin crawls and tingles when it is about time for another dose, but the new dose takes care of it.  No complaints at all.  I do have crazy dreams, but that is a small price to pay in exchange for no itching, etc."