When you’re healthy, the cilia in your airways move mucus towards your throat to either be coughed up or swallowed. But with a respiratory tract infection (like the common cold), mucus can build up in your airways and lungs, so your body has to cough to get rid of it. Guaifenesin, the ingredient in Mucinex that makes coughs more productive, and Dextromethorphan, the additional ingredient in Mucinex DM that relieves the intensity and the impulse to cough, work together so you experience fewer, but more productive coughs.

Original bi-layer tablets - One layer for immediate release, the other layer for extended release.

Chest congestion is what happens when the mucus membranes (mucosa) that line your airways jump into overdrive. When you breathe in an irritant (like dust, bacteria or a virus), mucosa cells are attacked causing inflammation and extra mucus in your airways. This extra mucus is one of the ways your body tries to remove an irritant.

Original bi-layer tablets - One layer for immediate release, the other layer for extended release.

Q: What symptoms will Mucinex DM 12-HR help relieve?

A: Mucinex DM 12-HR will relieve both cough & chest congestion, while Mucinex 12-HR will relieve just chest congestion

Q: Can I take Mucinex DM 12-HR at night?

A: Yes, recommended 1 dose every 12 hours. Mucinex DM 12-HR helps control cough to help you get to sleep.

Q: How does Mucinex 12-HR last so long?

A: Our original bi-layer tablet contains an immediate-release layer on one side and extended-release layer on the other side which provides extended relief for up to 12 hours!

Q: Can Mucinex 12-HR products be used with other over-the-counter medicine or prescription meds?

A: Please speak with your healthcare provider!