I have prescribed atarax25mg/hydroxyzine25mg pills that I take for food allergies. I get really itchy if I don't take them, cause I still am unsure of the foods I'm allergic too and have to try to eat certain foods. Anyway, I took plan b two days ago and just took my allergy pill cause I was just too itchy. I haven't had any side affects yet but I'm just worried if it was the wrong choice or not.