Mucinex DM

Mucinex DM is a combination medicine used to treat cough and chest congestion caused by allergies, the common cold, or the flu.

Mucinex DM may also be used for reasons not mentioned in this medication guide.

Use this medicine exactly as it says on the label or as your doctor prescribed. Cold or cough medicine is meant for short-term use only.

Your dose might change if you switch to a different brand, strength, or form of this medicine. To avoid mistakes, use it exactly as directed on the label or as prescribed by your doctor.

Do not give this medicine to a child without checking with a doctor first. Follow all instructions when giving this medicine to a child. Do not use this medicine to make a child sleepy. Misusing this medicine can cause death in very young children.

Measure liquid medicine with the measuring device that comes with it (not a kitchen spoon).

You may need to shake the liquid before measuring a dose. Follow all instructions on the label.

Swallow the extended-release tablet whole; do not crush, chew, or break it.

Dissolve the effervescent tablets in at least 4 ounces of water. Stir and drink it right away. You can add more water to the glass, swirl it, and drink again.

Sprinkle the granules directly onto your tongue and swallow them right away.

Drink extra fluids to help loosen congestion and keep your throat moist while taking this medicine.

Contact your doctor if your symptoms do not get better after 7 days, or if you have a fever, rash, or headaches.

Follow the storage instructions that come with this medicine. Your pharmacist can give you more information on how to store it.

Do not use this medicine if you are currently using or have used an MAO inhibitor in the last 14 days. A serious drug interaction could happen. MAO inhibitors include isocarboxazid, linezolid, methylene blue injection, phenelzine, and tranylcypromine.

You should not take Mucinex DM if you are allergic to it.

Do not use Mucinex DM if you are currently using or have used an MAO inhibitor in the last 14 days, as a dangerous drug interaction could happen. MAO inhibitors include isocarboxazid, linezolid, methylene blue injection, phenelzine, and tranylcypromine.

Ask a doctor or pharmacist if this medicine is safe for you if you have:

• a cough with mucus; or
• asthma, emphysema, or chronic bronchitis.

This medicine may contain phenylalanine and could be harmful if you have phenylketonuria (PKU).

Ask a doctor before using this medicine if you are pregnant or breastfeeding.

Get emergency medical help if you have signs of an allergic reaction: hives, difficulty breathing, swelling of your face, lips, tongue, or throat.

Mucinex DM may cause serious side effects. Stop using Mucinex DM and call your doctor right away if you have:

• mood changes;
• severe headache; or
• severe dizziness or anxiety, feeling like you might pass out.

Common side effects of Mucinex DM may include:

• dizziness, drowsiness;
• sleep problems (insomnia);
• diarrhea; or
• feeling nervous, restless, anxious, or irritable.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You can report side effects to the FDA at 1-800-FDA-1088.

Mucinex DM can be used as needed. If you are following a dosing schedule and miss a dose, just skip it. Do not take two doses at the same time.

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.

Avoid driving or doing anything that could be dangerous until you know how Mucinex DM will affect you. Your reactions could be impaired.

Ask a doctor or pharmacist before taking other cough or cold medicines that may have similar ingredients.

Drinking alcohol with this medicine can cause side effects.

Ask a doctor or pharmacist before using any other medicines that can make you sleepy, like opioid medication, sleep medicine, a muscle relaxer, or medicine for anxiety or seizures. Inform your doctor about all other medicines you take. This includes prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible interactions are included here.