Breaks up mucus and relieves cough. Mucinex Dm (Dextromethorphan / Guaifenesin) is okay for loosening congestion in your chest and throat, but it could prevent you from coughing the mucus up. It comes as an extended-release tablet and a short-acting liquid.
How it works
Mucinex Dm (Dextromethorphan / Guaifenesin) is a combination medicine. Guaifenesin is an expectorant that breaks up and thins out mucus. Dextromethorphan is a cough suppressant.
› Mucinex Dm (Dextromethorphan / Guaifenesin) is a combination medicine that relieves multiple cold symptoms. It's good to use if you have chest congestion and a cough.
› Helps loosen the mucus and phlegm that builds up in productive and wet coughs.
› The extended release version of Mucinex DM lasts up to 12 hours.
Downsides and risks
› Mucinex Dm (Dextromethorphan / Guaifenesin) isn’t useful if you have a dry cough without mucus or phlegm.
› The two medications in this product could potentially work against each other. Guaifenesin makes mucus easier to cough up, while dextromethorphan (the "DM" in Mucinex Dm (Dextromethorphan / Guaifenesin)) stops you from coughing.
› Can cause sleepiness, dizziness, and an upset stomach.
Tips from our pharmacists for people taking the medication
› Cough suppressant starts working in 15 to 30 minutes.
› Follow age-specific dosing instructions on how much to take. Don't take more than the recommended dose.
› Drink plenty of fluids while taking Mucinex Dm (Dextromethorphan / Guaifenesin) because liquid helps break down mucus.
› If your cough lasts more than 7 days, call your doctor.