How do the active ingredients in Lemsip Cough for Mucus Cough & Catarrh oral solution work?

In Lemsip Cough for Mucus Cough & Catarrh oral solution, guaifenesin thins mucus and reduces its stickiness to help its clearance, while cetylpyridinium chloride is an oral antiseptic active against Gram-positive bacteria, used for superficial mouth infections.