A Alka-Seltzer Plus Flu Liquigels (Apap/Dextromethorphan/Pseudoephedrine) by adhealth32 August 26, 2010 What is Alka-Seltzer Plus Flu Liquigels (Apap/Dextromethorphan/Pseudoephedrine)? Acetaminophen is a pain reliever and fever reducer.…