Codeine (codeine phosphate) contains the active ingredient codeine and is used to reduce pain from headache, the flu and common cold. See here for more information and to order.
A: Mucinex contains the active ingredient guaifenesin, which is an expectorant that helps loosen phlegm and thin bronchial secretions. Mucinex does not have rapid heart rate as a possible side effect. There is a product called Mucinex-D that contains pseudoephedrine, and this ingredient can increase heart rate.
Mucinex Powers Through Cough & Congestion for 12 Hours. Whether you have stubborn chest congestion or chest congestion with a nagging cough, MucinexÂ® has a range of products with bi-layer tablets that last for 12 hours. One layer for immediate release, the other layer for extended release, so you can say goodbye to retaking medicine every 4 hours. Compare.