Discussions that mention benadryl

High & Low Blood Pressure board


If anything Allegra will lower your BP...it is an antihistamine. Like chlorpheniramine maleate and Benadryl (diphenhydramine) it should be fine to use for sneezing and teary eyes.

BUT the "D" in Allegra-D is the common decongestant, pseudoephedrine which will raise your BP considerably. It shouldn't be used by hypertensives.

I think the lower BP going off the fexofenadine (Allegra) is a coincidence.