Robitussin and other OTC remedies that contain dextromethorphan don’t do much to stop a cough. You’re better off sucking on a lozenge. Luden’s Throat Drops are a good choice because they contain pectin and honey, two ingredients that coat your raw throat and soothe the tickle that triggers a coughing fit. Or try a spoon of plain honey before anything else. That worked better at suppressing coughs than a honey-flavored cough syrup in one study. (Warning: Never give honey to children younger than 1 year. It can carry botulism spores that can be dangerous to infants.)