I've had chronic hives for three months now. My dermatologist has run blood work and x-rays, and I am perfectly healthy except for the hives...EVERY DAY. I have taken Benadryl, Clarinex, Allegra, Zyrtec, Atarax, Sinequan, and now Periactin. Basically, I have pretty much run through available antihistamines. Still..I look like a leopard every day. At this point I don't care if I have to be medicated for the rest of my life...I just want to find an antihistamine cocktail that works? Anyone know anything about antacids? Any suggestions would be greatly appreciated!