No coughing matter. Cough experts say many over-the-counter medications probably aren't worth the money.
D000996:Antitussive Agents / Q000627:therapeutic use*; D003371:Cough / Q000188:drug therapy*; D006801:Humans; D004366:Nonprescription Drugs / Q000627:therapeutic use*
D000996:Antitussive Agents; D004366:Nonprescription Drugs