Alka-Seltzer Plus Maximum Strength PowerMax Sinus Congestion and Pain Medicine, Day + Night Liquid Gels - the maximum strength formula. Designed to be medicine for adults (and children 12 years and older), this powerful medication provides relief from sinus congestion, pain, headaches, fever, cold and flu symptoms. The daytime liquid gels are a non-drowsy formula to help provide relief from fever, sinus congestion / pressure, headache, minor aches / pain, and nasal congestion, so you can get back to your day routine fast. The nighttime cold and flu medicine also provides relief from fever, cold & flu symptoms, as well as runny nose and sneezing.