Antihistamines Raise Blood Pressure?
I used to think that only decongestants raise blood pressure, but have also come across conflicting information about antihistamines. The theory is that histamines cause blood vessel dialation (established), and antihistamines have the opposite reaction. Or do they just contra the histamine effect and go no further? As an allergy sufferer with borderline high bp, I'm wondering if antihistamine usage could be making things worse.
Last edited by hottoddy; 04-21-2004 at 11:01 PM.