Combo pack. Great value. Cold & Flu Medicine/Vitamin Supplement. DayQuil: Non-drowsy. DayQuil + vitamin C. Acetaminophen - aches, fever. Dextromethorphan - cough. Phenylephrine - nasal congestion. Alcohol free/antihistamine free. NyQuil: NyQuil + vitamin C. Acetaminophen - aches, fever. Dextromethorphan - cough. Doxylamine - sneezing, runny nose. Alcohol free.