Mucinex DM

Generic Name: Dextromethorphan HBr and guaifenesin

  • What is this medication?

    Mucinex DM contains a cough suppressant and an expectorant. It is intended to temporarily relieve coughing due to minor throat irritation as may occur with the common cold or inhaled irritants. It is also used for temporary relief of the intensity of coughing and the need to cough in order to help you fall asleep. It also helps loosen phlegm (mucus) so you can better clear it from your chest.
  • Are there any warnings associated with Mucinex DM?

    Do not use this product if you are taking a prescription monoamine oxidase inhibitor (MAOI), or for 2 weeks after stopping the MAOI drug. MAOIs are sometimes used for treating Parkinson's disease, depression, and other emotional or psychiatric conditions.

    Stop using the medication and talk to a doctor if you have a cough lasting more than 7 days, a cough that goes away then comes back, or a cough accompanied by a fever, rash, or lingering headache. These could be signs of a serious condition.

    Do not use for children under 12 years of age.

    Do not use more of this product than directed.

    Keep this product out of the reach of children. In the event of an overdose, obtain medical help or contact a poison control center immediately.

    Do not use if the carton is open or if the seal on the bottle printed "SEALED for YOUR PROTECTION" is broken or missing.

  • Should I talk to my doctor before taking Mucinex DM?

    Talk to a doctor before using this medication if you have a persistent or chronic cough such as occurs with to asthma, chronic bronchitis, emphysema, or smoking. Also talk to a doctor before using if you have a cough accompanied by excessive mucus.

    Ask a doctor before taking this product if you do not know if your prescription drug contains an MAOI.

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

  • What are the possible side effects of Mucinex DM?

    Side effects cannot always be anticipated. If any develop or change in intensity, tell your doctor as soon as possible. Only your doctor can determine if it is safe for you to continue taking this drug.
  • What should I avoid while taking

    Mucinex DM?

    Do not crush, chew, or break the tablet.

    Avoid taking a prescription monoamine oxidase inhibitor (MAOI) or certain drugs for depression, psychiatric or emotional conditions, or Parkinson's disease.

  • What are possible food and drug interactions associated with Mucinex DM?

    If Mucinex DM is taken with certain other drugs, the effects of either could be increased, decreased, or altered. Always check with your doctor before combining Mucinex DM with any other medication.
  • What is the usual dosage of Mucinex DM?

    Do not crush, chew, or break the tablet. Take the tablet with a full glass of water. You can take it with or between meals.

    Adults and children 12 years: Take 1 or 2 tablets every 12 hours; not more than 4 tablets in a 24-hour period.

    Children <12 years: Do not use.

  • How should I store Mucinex DM?

    Store at room temperature.

Meet the Pharmacists

I'm Kristen Dore, PharmD. Welcome to PDR Health!

Check out my latest blog post on heartburn medication

Mucinex DM Related Drugs

Mucinex DM Related Conditions