Alka-Seltzer Plus Cold Night Effervescent Tablets dissolve quickly in hydrating water and are instantly ready to start working to provide a fast cold relief at night. Each dose is individually wrapped and transforms in just 4oz of water into a liquid-fast medicine. After you drink the refreshing, sparkling solution, Alka-Seltzer Plus works quickly to relieve your worst cold symptoms: Cough, Sneezing, Runny Nose, Sore Throat, Nasal Congestion, Sinus Congestion & Pressure, Fever, Headache and Body Aches & Pains