Vicks NyQuil cold and flu LiquiCaps provides fast, powerful relief for your worst cold and flu symptoms. When cold symptoms keep you up, turn to Vicks NyQuil cold and flu nighttime relief medicine to help you get the rest you need. When you need fast relief, this powerful, multi-symptom relief medicine treats headache, fever, sore throat, minor aches and pains, sneezing, runny nose and cough due to minor throat and bronchial irritation. Active ingredients per dose (2 Liquicaps) for Adults are Acetaminophen 650 mg (pain reliever/fever reducer), Dextromethorphan HBr 30 mg (cough suppressant) and Doxylamine succinate 12.5 mg (antihistamine).