DayQuil Cold & Flu Liquicaps are an over-the-counter daytime cold and flu remedy presented as liquid-filled softgel capsules. They are used to temporarily relieve symptoms including nasal congestion, cough, sore throat, headache, and minor aches and fever. The formulation is designed for non-drowsy relief to allow normal daytime functioning. Always follow the directions and warnings on the product packaging and consult a healthcare professional if symptoms persist or if you have questions about interactions or suitability.