Powerful Cold Symptom Relief for Day or Night. Power through your day with the non-drowsy, multi-symptom cold and flu relief of Vicks DayQuil LiquiCaps . Turn to NyQuil Cold & Flu Nighttime Relief LiquiCaps to relieve your cough due to minor throat and bronchial irritation, sore throat, headache, minor aches and pains, fever, runny nose, and sneezing, so you can get the sleep you need.