Question: are pseudoephedrine and dextromethorphan the same?
Answer: Dextromethorphan, guaifenesin, and pseudoephedrine is a combination medicine used to treat cough, stuffy nose, sinus congestion and chest congestion caused by allergies, the common cold, or the flu. This medicine will not treat a cough that is caused by smoking, asthma, or emphysema.