Hi all, I take 2 antihistamines a day for past two years as I have bad allergies.I stopped taking them just two days ago in preparation for an allergy blood test, the RAST test.To my dismay, I woke up this morning with red itchy patches in face, sore eyes , lip slightly swollen. I have severe atopic eczema which is under control.Would not taking antihistamines for just two days have this affect?? I went back on tablets this morning but am wondering is this a coincidence or a result of not taking tablets ?? Many thanks x