Whether you “caught a bug” from a friend, loved one, coworker or perfect stranger, it's good to know Alka-Seltzer Plus is always your ally when it comes to cold and flu symptom relief. Get fast, effective medicine for your cough and chest congestion. Alka-Seltzer Plus Maximum Strength Effervescent Tablets dissolve quickly in water before you take them. As you drink the refreshing, sparkling cool blueberry pomegranate flavored solution, Alka-Seltzer Plus works fast to relieve your worst cough symptoms: Controls Cough, Relieves Chest Congestion, Thins & Loosens Mucus,