How about trying Xyzal?
It's available on prescription in the USA since may 2008.
http://www.xyzal.com
http://en.wikipedia.org/wiki/Xyzal
Or what about these products?
http://www.hivotin.com
http://hivotab.com
Check this out about food-allergy:
http://www.medhelp.org/posts/show/377371
I tend to not believe much in homeopathy but my chemistry teacher at school
claimed that his son was cured from eczema by homeopathic Natrium Muriaticum
internally taken and highly potentiated(diluted) so no or hardly any actual molecules were present in the medicin (just the energy), supposed to be most potent that way.