Alka-Seltzer Plus Day and Night Cough, Mucus & Congestion PowerMax Gels, 16 ct. These Maximum Strength Day + Night PowerMax Liquid Gels provide potent relief for multiple cold and flu symptoms. They effectively reduce fever, help loosen phlegm, and make coughs more productive. Suitable for adults and children 12 years and older, these gels offer a comprehensive solution to combat cold and flu symptoms. Whether you're battling a persistent cough, nasal congestion, or mucus buildup, these gels provide quick and effective relief day or night.