I've been on hydroxizine, xyzal, fexofenidine, doxepin, claritan, ranitidine
, and of course, the dreaded prednisone. I have found that all anti-histhamines so far have little to no effect. I get hives when I work-out or sweat, when I swim, when a cold wind hits me, during my period, when I'm sick, and sometimes for no reason at all. The only drug that seems to be effective is prednisone, which makes me fat and jittery. I feel like a fluffy pillow or a marshmallow when I take prednisone.