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.
I had a bad head cold with severe pressure and some infection in my sinuses. I was told no nsaids, no codeine cough syrup or decongestants. I found I could take a Mucinex 12 hour capsule every 12....