Ano ang effective over the counter medicine ninyo for cough?

Kapag may accompanying symptoms like cold, difficulty in breathing I go for Tuseran kasi paracetamol na rin sya. Pero kung super bad cough na mahirap ilabas, go for Robitussin. It's an expectorant kasi which according to WebMD is used to treat coughs and congestion caused by the common cold, bronchitis, and other breathing illnesses. So papanipisin nya yung phlegm para mailabas mo.