The fexofenadine hcl 180 mg is not working well enough on its own can i add a benadryl? one hour after the fexofenadine tablet?
I realize that this answer is a bit late, but yes you can take Benadryl soon after a fexofenadine dose, if fexofenadine is not working. However, try to keep to only one type of antihistamine at a time.
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