You shouldnât take codeine if you're allergic to it (or to any other ingredients in the drug) or have trouble breathing. If you experience any of the following after starting codeine, talk to your doctor, as you may be allergic to the drug: Itching; Rash; Hives. Before taking codeine, tell you doctor if you have: Kidney or liver problems; Seizures
Mucinex does help thin out mucus but doesn't do anything to reduce the swelling and inflammation in your sinuses. There are several medical options for reducing this inflammation: 1. Try switching from a neti pot to a NeilMed Sinus Rinse bottle.
CVS pharmacy recommended Mucinex DM when I had flu-like symptoms and a sinus infection. I tried other over-the-counter medications and they did not do anything. Once I took Mucinex DM, my sinus and flu symptoms started to decreased; it was the best feeling in the world. All the gross stuff that was in my chest and nose cleared up. I definitely recommend this product to help relieve sinus pressure and to clear your system.