Medication

Mucinex Fast-Max Severe Congestion and Cough

Generic name: dextromethorphan hydrobromide, guaifenesin · Brand names: Mucinex Fast-Max Severe Congestion And Cough

Expectorant [epc]

Information sourced from FDA Structured Product Labeling, updated May 19, 2026.

What is it used for?

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 nasal congestion due to a cold

How to take it

Directions do not take more than 12 caplets in any 24-hour period adults and children 12 years of age and over: take 2 caplets every 4 hours children under 12 years of age: do not use

Warnings

Warnings Do not use 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 heart disease diabetes high blood pressure thyroid disease trouble urinating due to an enlarged prostate gland persistent or chronic cough such as occurs with smoking, asthma, chronic bronchitis, or emphysema cough that occurs with too much phlegm (mucus) When using this product do not use more than directed Stop use and ask a doctor if nervousness, dizziness, or sleeplessness occur symptoms do not get better within 7 days or occur with fever cough comes back, or occurs with fever, rash, or headache that lasts.

These could be signs of a serious condition. 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.

All information on this site is provided “as-is” for informational purposes only and is not a substitute for medical advice or treatment. You should consult with a medical professional if you have any questions about your health. Source: FDA Structured Product Labeling.