DayQuil delivers powerful multi-symptom relief for your headache, fever, sore throat, minor aches and pains, nasal congestion, sinus pressure and cough.. DayQuil Cold & Flu liquid medicine temporarily relieves common cold and flu symptoms so you can get on with your day; there are no ingredients, such as alcohol, to make you drowsy.. 12-ounce bottle of DayQuil was designed using less plastic than earlier versions of liquid DayQuil..