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A member asked:
I'm just making sure it's okay if i take dayquil after i took allegra (fexofenadine) d?
A doctor has provided 1 answer
Many dayquils: Unfortunately there are several formulations under the DayQuil name. If it contains phenylephrine then it's not so good to mix with the "D" in Allegra-D because it contains pseudoephedrine. Those are both stimulant decongestants and can cause rapid heart beat, elevated blood pressure and nervous side effects.
Answered 4/23/2021
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