Vicks DayQuil and NyQuil Cough, Cold & Flu Relief LiquiCaps Convenience Pack contains 72 liquid capsules, each of which contains 325 mg. of acetaminophen to relieve pain and reduce fever, 10 mg of dextromethorphan HBr to suppress coughing, and 5 mg of phenylephrine as a nasal decongestant. Vicks DayQuil LiquiCaps also contain an expectorant to help you clear your congestion while you're awake, and Vicks NyQuil contains an antihistamine to reduce inflammation and agitation for a restful night's sleep.