Drug Summary
What Is Mucinex DM?
Mucinex DM (guaifenesin and dextromethorphan hydrobromide tablet, extended release) is a combination of an expectorant and cough suppressant used to help loosen phlegm (mucus) and thin bronchial secretions to rid the bronchial passageways of bothersome mucus and make coughs more productive. Mucinex DM temporarily relieves cough due to minor throat and bronchial irritation as may occur with the common cold or inhaled irritants, the intensity of coughing, and the impulse to cough to help you get to sleep. Mucinex DM is available over-the-counter (OTC).
What Are Side Effects of Mucinex DM?
Mucinexmay cause serious side effects including:
- hives,
- difficulty breathing,
- swelling of your face, lips, tongue, or throat,
- severe dizziness,
- rash, and
- itching
Get medical help right away, if you have any of the symptoms listed above.
Side effects of Mucinex DM include:
- dizziness,
- drowsiness,
- nausea, and
- vomiting.
Seek medical care or call 911 at once if you have the following serious side effects:
- Serious eye symptoms such as sudden vision loss, blurred vision, tunnel vision, eye pain or swelling, or seeing halos around lights;
- Serious heart symptoms such as fast, irregular, or pounding heartbeats; fluttering in your chest; shortness of breath; and sudden dizziness, lightheadedness, or passing out;
- Severe headache, confusion, slurred speech, arm or leg weakness, trouble walking, loss of coordination, feeling unsteady, very stiff muscles, high fever, profuse sweating, or tremors.
This document does not contain all possible side effects and others may occur. Check with your physician for additional information about side effects.
Dosage for Mucinex DM
The dose of Mucinex DM for adults and children 12 years and older is 1 or 2 tablets every 12 hours; not more than 4 tablets in 24 hours.
Mucinex DM In Children
Mucinex DM is not recommended for use in children under 12 years of age.
What Drugs, Substances, or Supplements Interact with Mucinex DM?
Mucinex DM may interact with other medicines.
Tell your doctor all medications and supplements you use.
Mucinex DM During Pregnancy and Breastfeeding
Tell your doctor if you are pregnant or plan to become pregnant before using Mucinex DM. Consult your doctor before breastfeeding.
Additional Information
Our Mucinex DM (guaifenesin and dextromethorphan hydrobromide tablet, extended release) Side Effects Drug Center provides a comprehensive view of available drug information on the potential side effects when taking this medication.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
Description for Mucinex
Active ingredients (in each extended-release bi-layer tablet)
Dextromethorphan HBr 30 mg
Guaifenesin 600 mg Expectorant
Uses for Mucinex
Uses
- helps loosen phlegm (mucus) and thin bronchial secretions to rid the bronchial passageways of bothersome mucus and make coughs more productive
- temporarily relieves:
- cough due to minor throat and bronchial irritation as may occur with the common cold or inhaled irritants
- the intensity of coughing
- the impulse to cough to help you get to sleep
Dosage for Mucinex
Directions
- do not crush, chew, or break tablet
- take with a full glass of water
- this product can be administered without regard for timing of meals
- adults and children 12 years and older: 1 or 2 tablets every 12 hours; not more than 4 tablets in 24 hours
- children under 12 years of age: do not use
HOW SUPPLIED
Storage And Handling
Store at 20-25°C (68-77°F)
Inactive ingredients
carbomer hom*opolymer type B; D&C yellow #10 aluminum lake; hypromellose, USP; magnesium stearate, NF; microcrystalline cellulose, NF; sodium starch glycolate, NF
Questions?
1-866-MUCINEX (1-866-682-4639)
You may also report side effects to this phone number.
Manufactured by: Dist. by: RB Health (US) Parsippany, NJ 07054-0224. Made in England. Revised: N/A
Side Effects for Mucinex
No information is available.
Drug Interactions for Mucinex
No information is available.
Warnings for Mucinex
Do not use
- for children under 12 years of age
- if you are now taking a prescription monoamine oxidase inhibitor (MAOI) (certain drugs for depression, psychiatric or emotional conditions, or Parkinson's disease), or for 2 weeks after stopping the MAOI drug. If you do not know if your prescription drug contains an MAOI, ask a doctor or pharmacist before taking this product.
Ask a doctor before use if you have
- persistent or chronic cough such as occurs with smoking, asthma, chronic bronchitis, or emphysema
- cough accompanied by too much phlegm (mucus)
When using this product
- do not use more than directed
Stop use and ask a doctor if
- cough lasts more than 7 days, comes back, or occurs with fever, rash, or persistent headache. These could be signs of a serious illness.
If pregnant or breast-feeding, ask a health professional before use.
Keep out of reach of children. In case of overdose, get medical help or contact a Poison Control Center right away.
Precautions for Mucinex
No information provided.
Overdose Information for Mucinex
No information is available.
Contraindications for Mucinex
No information is available.
Clinical Pharmacology for Mucinex
No information provided.
Patient Information for Mucinex
No information provided. Please refer to the WARNINGS AND PRECAUTIONS section.
From 
Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
