Hi. I am currently taking
Zyrtec-D for my allergies, it has helped me a great deal. I recently had my cholesterol checked, and the doc suggested I use
niacin. Now, from what I understand, the Zyrtec-D is an antihistamine and decongestant combined, however, I read that niacin causes a flush because it opens up your blood vessels and also releases histamine. Is this true? If it is, can I take my Zyrtec-D AND niacin?
curious question here 
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