can i take dayquil and zyrtec

It is generally safe to take DayQuil and Zyrtec together as there are no known significant interactions between the ingredients in DayQuil (acetaminophen, dextromethorphan, guaifenesin, phenylephrine) and Zyrtec (cetirizine). DayQuil does not contain cetirizine, so there is no risk of duplication or overdose of this antihistamine. However, caution is advised if you are sensitive to side effects like drowsiness, and it is always best to consult a healthcare professional especially if you have other health conditions or take other medications. Zyrtec is an antihistamine typically used for allergies, while DayQuil is used for cold and flu symptoms, so they can complement each other in managing symptoms.