Monday, December 27, 2010 Patricia P, Community Member, asks

Q: If You Take Blood Pressure Medicine Can You Take Benadryl

I take diltiazem and Diovan HCT for blood pressure. Is it ok to take Benadryl for hives?

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Answers (1)
Karen Lee Richards, Health Guide
12/27/10 10:35pm

According to the drug interaction checker, Benadryl can increase the effects of diltiazem, which could cause your blood pressure to drop too much.  It advises close monitoring of blood pressure if they are taken together.  Ideally, I would say to check with your doctor before taking the Benadryl.  Since it's after hours, perhaps you could call your local Ask a Nurse or a pharmacist at an all-night pharmacy for advice. 


Medication Overload: Watch for Drug Interactions

Understanding Low Blood Pressure

What Your Blood Pressure Should Be


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By Patricia P, Community Member— Last Modified: 08/08/14, First Published: 12/27/10