Question: what cough syrup is an expectorant?
Answer: A common antitussive is dextromethorphan (some brand names: Triaminic Cold and Cough, Robitussin Cough, Vicks 44 Cough and Cold). The only expectorant available in OTC products is guaifenesin (2 brand names: Mucinex, Robitussin Chest Congestion).