Vicks DayQuil Severe Cold & Flu Liquid - Maximum symptom fighting ingredients to relieve your worst cold symptoms.* *among OTC cold/flu medicines. Vicks NyQuil Severe Cold & Flu Nighttime Relief Liquid - Maximum symptom fighting ingredients to relieve your worst cold symptoms.* *among OTC cold/flu medicines. Maximum strength cold & flu relief. Vicks DayQuil Severe Cold & Flu Liquid - Non-Drowsy. Vicks NyQuil Severe Cold & Flu Nighttime Relief Liquid - Nighttime. When using DayQuil or NyQuil products, carefully read each label to ensure correct dosing. Use as directed. Keep out of reach of children.