Levocetirizine
"I started developing an outbreak of rashes all over my body about two years ago. Since then my GP has prescribed the usual antihistamine cetirizine and hydroxyzine.  I noticed my rashes didn't subside totally after I took them both, but when I was prescribed Xyzal, I noticed it lowered the inflammation of my skin and the itchiness level was greatly reduced too. Since then I have been taking Xyzal together with Atarax and I find it to be quite effective as a combination. I have been taking Xyzal on a daily basis ever since.  

My rashes come back sometimes, but I have no choice since there are no newer antihistamine other then Xyzal.  My doctor has never prescribed me Allegra."