Benylin is a brand name owned by Johnson & Johnson for a range of cough, cold and flu medications. Some Benylin products also contain codeine, which is used to treat pain, cough and diarrhea. The flagship cough syrup and cold care brand is marketed in several countries as Benylin DM, for its active ingredient, dextromethorphan. However, the range of products available in both solid dosage and liquid forms have formulations with multiple ingredients including pseudoephedrine, paracetamol (acetaminophen) and guaifenesin. In 2016 it was one of the biggest-selling branded over-the-counter medications sold in Great Britain, with sales of £36.8 million.[1]

Source:Wikipedia.org