Drowsiness: It can make you very drowsy and possible affect your heart rate and rhythm. Do no mix these on your own.
Answered 3/27/2012
6k views
Depends: On what allergy med ur taking: traditional antihistamines like benadryl/tavist will add drowsiness; newer "non-sedating" ones like Allegra (fexofenadine) should be ok; zyrtec may add drowsiness in some people. Ask ur doc or pharmacist.
Answered 10/4/2016
6k views
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