I have been having an allergic reaction to something yet defined, causing my eyes, cheeks, lips to swell. All the logical tests have been done, but I am curious, since I am allergic to sulpha, does benadryl or any of the following antihistamine type products I am taking to keep swelling down contain sulpha. Oh, I did have a biopsy done on a walnut size lump on my forehead that comes and goes every week or two and then disappears in a few hours, and the biopsy identified it as a hive zantac zyrtec benadryl doxipin