what cough medicine is best?
['Cold and flu.', 'Robitussin chesty cough medicine (guaifenesin)', 'The best way to get rid of a cough.', 'Robitussin dry cough medicine (dextromethorphan)', 'Benylin dry coughs.', 'Lemsip cough information and side effects.', 'Lemsip cough for chesty cough (guaifenesin)']