R Robitussin Flu (Apap/Chlorpheniramine/Dextromethorphan/Pse) by adhealth32 January 22, 2011 What is Robitussin Flu (Apap/Chlorpheniramine/Dextromethorphan/Pse)? Acetaminophen is a pain reliever and fever reducer. Chlorpheniramine is…