Loratadine (Clarityn) Desloratadine (Neo-Clarityn) or Fexofenadine (Telfast) are all ok I think since they are proper non-drowsy anti-histamines.
Have a read of the wikipedia article if you're interested in the subject (
http://en.wikipedia.org/wiki/Anti-histamine ) I'm sure there are one or two inaccuracies but it's fairly informative.