Cough Medicine Abuse: Dextromethorphan
Robitussin DM is the brand name cough syrup that combines dextromethorphan and guaifenesin. Dextromethorphan is a cough suppressant that affects the signals in the brain that trigger the cough reflex, while guaifenesin acts as an expectorant. As a result, Robitussin DM is used to treat a cough, but is not effective in treating a cough [...]


