is it ok to take xyzal with high blood pressure?
cetirizine (Zyrtec) and levocetirizine (Xyzal): You may experience increased drowsiness if you take cetirizine or levocetirizine in combination with methyldopa (Aldomet). diphenhydramine (Benadryl): Any product containing diphenhydramine may counteract the effects of many of your blood pressure medications.