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Mucus Relief Dm

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Active ingredients
  • Guaifenesin 400 mg/20 mL
  • Dextromethorphan Hydrobromide 20 mg/20 mL
Other brand names
Drug classes
Expectorant, Sigma-1 Agonist, Uncompetitive N-methyl-D-aspartate Receptor Antagonist
Dosage form
Liquid
Route
Oral
Prescription status
OTC (over the counter)
Pregnancy
See Pregnancy Use Section
Lactation
See Lactation Use Section
Marketed in the U.S.
Since 2016
Label revision date
March 23, 2026
Drug Information (PDF)
Prescribing information, PDF file
Active ingredients
  • Guaifenesin 400 mg/20 mL
  • Dextromethorphan Hydrobromide 20 mg/20 mL
Other brand names
Drug classes
Expectorant, Sigma-1 Agonist, Uncompetitive N-methyl-D-aspartate Receptor Antagonist
Dosage form
Liquid
Route
Oral
Prescription status
OTC (over the counter)
CSA schedule
Not a scheduled drug
Pregnancy
See Pregnancy Use Section
Lactation
See Lactation Use Section
Marketed in the U.S.
Since 2016
Label revision date
March 23, 2026
Manufacturer
Dolgencorp, Inc. (DOLLAR GENERAL & REXALL)
Registration number
M012
NDC root
55910-505
Drug Information (PDF)
Prescribing information, PDF file
Packaging Info
Packaging & NDC Codes

If you are a healthcare professional or from the pharmaceutical industry please visit this version.

If you are a consumer or patient please visit this version.

Drug Overview

Mucus Relief DM Max is a maximum strength, fast-acting medication designed to help relieve cough and chest congestion. It contains two active ingredients: dextromethorphan HBr, which acts as a cough suppressant to help control your cough, and guaifenesin, an expectorant that helps loosen phlegm (mucus) and thin bronchial secretions. This combination makes it easier for you to clear mucus from your airways, allowing for more productive coughing.

This product is intended for temporary relief of cough caused by minor throat and bronchial irritation, such as that which may occur with the common cold or from inhaled irritants. It can also help reduce the intensity of coughing, making it easier for you to get to sleep. Mucus Relief DM Max is suitable for individuals aged 12 and over.

Uses

This medication is designed to help you breathe easier by loosening phlegm (mucus) and thinning bronchial secretions. This action helps clear out bothersome mucus from your airways, making your coughs more productive.

You can use this medication to temporarily relieve coughing caused by minor throat and bronchial irritation, which can happen with the common cold or from inhaling irritants. It also helps reduce the intensity of your cough and can lessen the urge to cough, making it easier for you to get a good night's sleep.

Dosage and Administration

When using this medication, it's important to follow the dosing instructions carefully to ensure your safety and effectiveness. You should not take more than 6 doses within a 24-hour period. To measure your dose, always use the dosing cup that comes with the product; using any other device could lead to incorrect dosing.

For adults and children aged 12 years and older, the recommended dose is 20 milliliters (mL) every 4 hours. If you are caring for children under 12 years of age, please do not use this medication for them. Make sure to keep the dosing cup with the product for easy access each time you need to measure your dose.

What to Avoid

You should avoid using this product if you are currently taking a prescription monoamine oxidase inhibitor (MAOI), which is a type of medication used for depression, psychiatric or emotional conditions, or Parkinson's disease. Additionally, you should not use this product for at least two weeks after stopping an MAOI. If you're unsure whether your prescription includes an MAOI, please consult your doctor or pharmacist before using this product.

It's also important to follow the dosage instructions carefully and not exceed the recommended amount. Misuse or taking more than directed can lead to serious health issues, including dependence (a condition where your body becomes reliant on a substance). Always prioritize your safety and well-being by adhering to these guidelines.

Side Effects

You should avoid using this medication if you are currently taking a monoamine oxidase inhibitor (MAOI), which is a type of drug used for certain mental health conditions, or if you have stopped taking an MAOI within the last two weeks. If your cough lasts more than seven days, returns, or is accompanied by a fever, rash, or headache that persists, it’s important to stop using the medication and consult a doctor, as these could indicate a more serious health issue.

Before using this medication, talk to your doctor if you have a chronic cough related to smoking, asthma, chronic bronchitis, or emphysema, or if your cough produces excessive mucus. In the event of an overdose, seek medical assistance immediately or contact a Poison Control Center at 1-800-222-1222.

Warnings and Precautions

You should not use this product if you are currently taking a prescription monoamine oxidase inhibitor (MAOI), which is a type of medication used for depression or certain other conditions. Additionally, you should wait at least two weeks after stopping an MAOI before using this product. If you're unsure whether your medication contains an MAOI, please consult your doctor or pharmacist.

Before using this product, it's important to talk to your doctor if you have a persistent cough due to smoking, asthma, chronic bronchitis, or emphysema, or if your cough is accompanied by excessive mucus. If you experience an overdose, seek medical help immediately or contact a Poison Control Center at 1-800-222-1222.

You should stop using this product and call your doctor if your cough lasts more than seven days, returns, or occurs with a fever, rash, or headache that persists, as these may indicate a more serious health issue.

Overdose

If you suspect an overdose, it’s crucial to seek medical help immediately. You can contact a Poison Control Center at 1-800-222-1222 for guidance. Signs of an overdose can vary, but they may include unusual drowsiness, confusion, or difficulty breathing.

Always err on the side of caution—if you notice any concerning symptoms or if you’re unsure, don’t hesitate to get help right away. Your health and safety are the top priority.

Pregnancy Use

If you are pregnant or breastfeeding, it’s important to consult with a healthcare professional before using this medication. They can provide guidance on whether it’s safe for you and your baby. Always prioritize your health and the health of your child by seeking expert advice.

Lactation Use

If you are pregnant or breastfeeding, it’s important to consult with a healthcare professional before using any medication. This ensures that you understand any potential risks and can make informed decisions about your health and the health of your baby. Always prioritize open communication with your doctor regarding your breastfeeding journey.

Pediatric Use

It's important to be cautious when using this medication for children. If your child is under 12 years old, you should not use this product. For those aged 12 and older, the recommended dosage is 20 mL every 4 hours. Always ensure that the medication is kept out of reach of children to prevent accidental ingestion.

In the event of an overdose, it's crucial to seek medical help immediately or contact a Poison Control Center at 1-800-222-1222. Your child's safety is the top priority, so please follow these guidelines carefully.

Geriatric Use

When it comes to using this medication in older adults, there is no specific information available about dosage adjustments, safety concerns, or special precautions. This means that healthcare providers may not have tailored guidelines for elderly patients.

If you or a loved one is an older adult considering this medication, it’s important to discuss any potential risks and benefits with your healthcare provider. They can help determine the best approach based on individual health needs and conditions. Always prioritize open communication with your doctor to ensure safe and effective treatment.

Renal Impairment

If you have kidney problems, it's important to know that the drug insert does not provide specific information about dosage adjustments, special monitoring, or safety considerations for your condition. This means that there are no tailored guidelines for how this medication should be used if you have renal impairment (kidney issues).

Always consult your healthcare provider for personalized advice and to ensure that any medication you take is safe and appropriate for your health situation. They can help you understand how to manage your treatment effectively while considering your kidney health.

Hepatic Impairment

If you have liver problems, it's important to know that the drug insert does not provide specific information about dosage adjustments, special monitoring, or precautions for your condition. This means that there are no tailored guidelines for how this medication may affect you if you have hepatic impairment (issues with liver function).

Always consult your healthcare provider for personalized advice and to discuss any concerns you may have regarding your liver health and medication use. They can help ensure that you receive the safest and most effective treatment based on your individual needs.

Drug Interactions

It's important to have open conversations with your healthcare provider about any medications or tests you may be taking. While there are no specific drug interactions or laboratory test interactions noted for this medication, your healthcare provider can help ensure that everything you are taking works well together and is safe for you.

Always feel free to ask questions and share your complete list of medications and any lab tests you may be undergoing. This way, you can receive the best possible care tailored to your needs.

Storage and Handling

To ensure the best quality and safety of your product, store it at room temperature, specifically between 20-25ºC (68-77ºF). Avoid refrigerating it, as this can affect its effectiveness. Always keep the dosing cup with the product for accurate measurement.

When handling the product, check that the printed safety seal around or under the cap is intact. If the seal is broken or missing, do not use the product. Remember to discard any unused product after opening to maintain safety and effectiveness.

Additional Information

You should take this medication orally. For adults and children aged 12 years and older, the recommended dose is 20 mL every 4 hours. However, it is important to note that this medication is not recommended for children under 12 years of age. If you have any questions about how to use this medication, consult your healthcare provider for guidance.

FAQ

What is Mucus Relief DM Max?

Mucus Relief DM Max is a maximum strength, fast-acting medication that contains dextromethorphan HBr as a cough suppressant and guaifenesin as an expectorant.

How does Mucus Relief DM Max work?

It helps loosen phlegm (mucus) and thin bronchial secretions, making coughs more productive while relieving chest congestion.

Who can use Mucus Relief DM Max?

This product is intended for adults and children aged 12 and over. Children under 12 years of age should not use it.

What are the dosing instructions for Mucus Relief DM Max?

Adults and children 12 years and older should take 20 mL every 4 hours, not exceeding 6 doses in a 24-hour period.

Are there any contraindications for using Mucus Relief DM Max?

Do not use if you are taking a prescription monoamine oxidase inhibitor (MAOI) or have taken one within the last 2 weeks.

What should I do if I experience side effects?

Stop use and ask a doctor if your cough lasts more than 7 days, returns, or occurs with fever, rash, or headache.

What should I do in case of overdose?

In case of overdose, seek medical help or contact a Poison Control Center immediately at 1-800-222-1222.

Can I use Mucus Relief DM Max if I am pregnant or breastfeeding?

If you are pregnant or breastfeeding, consult a health professional before using this product.

How should I store Mucus Relief DM Max?

Store between 20-25ºC (68-77ºF) and do not refrigerate. Keep the dosing cup with the product.

Packaging Info

Below are the non-prescription pack sizes of Mucus Relief Dm (dextromethorphan hbr, guaifenesin). Columns show Packaging, Formulation Type, and Active Ingredient Strength.

Packaging configurations for Mucus Relief Dm.
Details

Drug Information (PDF)

This file contains official product information for Mucus Relief Dm, including active ingredients, dosage, warnings, and labeling as submitted by the manufacturer for OTC distribution.

View product document (PDF)

Description

No description information is available for the specified drug.

Uses and Indications

This drug is indicated for the relief of cough associated with minor throat and bronchial irritation, which may occur due to the common cold or inhaled irritants. It aids in loosening phlegm (mucus) and thinning bronchial secretions, thereby facilitating the clearance of mucus from the bronchial passageways and making coughs more productive.

Additionally, this drug temporarily relieves the intensity of coughing and the impulse to cough, which may assist patients in achieving restful sleep.

There are no teratogenic or nonteratogenic effects associated with this drug.

Dosage and Administration

The maximum recommended dosage is 6 doses within a 24-hour period. Dosing should be measured exclusively with the dosing cup provided with the product; the use of any other measuring device is not advised. It is essential to keep the dosing cup with the product at all times to ensure accurate measurement.

For adults and children aged 12 years and older, the recommended dose is 20 mL every 4 hours, as needed or as directed by a healthcare professional. The use of this product is not recommended for children under 12 years of age.

Contraindications

Use of this product is contraindicated in patients currently taking a prescription monoamine oxidase inhibitor (MAOI), which includes certain medications for depression, psychiatric or emotional conditions, or Parkinson's disease. Additionally, use is contraindicated for a period of 2 weeks following the discontinuation of an MAOI. Patients should consult a healthcare professional if they are uncertain whether their prescription medication contains an MAOI.

Furthermore, the product should not be used in excess of the directed dosage.

Warnings and Precautions

It is imperative to adhere to the following warnings and precautions to ensure the safe use of this product.

Warnings The use of this product is contraindicated in individuals currently taking a prescription monoamine oxidase inhibitor (MAOI), which includes certain medications prescribed for depression, psychiatric or emotional conditions, or Parkinson's disease. Additionally, this product should not be used for a period of two weeks following the discontinuation of an MAOI. Healthcare professionals should advise patients to consult with a doctor or pharmacist if there is uncertainty regarding the presence of an MAOI in their prescription medication.

General Precautions Patients should seek medical advice prior to using this product if they have a persistent or chronic cough, particularly if it is associated with smoking, asthma, chronic bronchitis, or emphysema. Furthermore, individuals experiencing a cough that is accompanied by excessive phlegm (mucus) should also consult a healthcare provider before use.

Emergency Medical Help Instructions In the event of an overdose, it is crucial to obtain immediate medical assistance or contact a Poison Control Center at 1-800-222-1222.

Stop Taking and Call Your Doctor Instructions Patients are advised to discontinue use and consult a healthcare professional if their cough persists for more than seven days, recurs, or is accompanied by fever, rash, or a headache that lasts. These symptoms may indicate a serious underlying condition that requires medical evaluation.

Side Effects

Patients should be aware of the potential adverse reactions associated with the use of this medication. Serious adverse reactions may occur, particularly in patients who are currently taking or have recently discontinued a prescription monoamine oxidase inhibitor (MAOI). The use of this medication is contraindicated in such cases, as it may lead to significant health risks.

Patients are advised to discontinue use and consult a healthcare professional if their cough persists for more than 7 days, recurs, or is accompanied by fever, rash, or headache that lasts. These symptoms may indicate a serious underlying condition that requires medical evaluation.

Before using this medication, patients should seek medical advice if they have a persistent or chronic cough, such as that associated with smoking, asthma, chronic bronchitis, or emphysema. Additionally, those experiencing a cough with excessive phlegm (mucus) should also consult a healthcare provider prior to use.

In the event of an overdose, it is crucial for patients to seek immediate medical assistance or contact a Poison Control Center at 1-800-222-1222.

Drug Interactions

There are currently no documented drug interactions associated with the use of this medication. Additionally, there is no information available regarding interactions with laboratory tests. As such, no specific recommendations for dosage adjustments or monitoring are warranted at this time.

Packaging & NDC

Below are the non-prescription pack sizes of Mucus Relief Dm (dextromethorphan hbr, guaifenesin). Columns show Packaging, Formulation Type, and Active Ingredient Strength.

Packaging configurations for Mucus Relief Dm.
Details

Pediatric Use

Children under 12 years of age should not use this medication. For adults and children aged 12 years and older, the recommended dosage is 20 mL every 4 hours. It is important to keep this medication out of reach of children. In the event of an overdose, immediate medical assistance should be sought, or contact a Poison Control Center at 1-800-222-1222.

Geriatric Use

There is no specific information regarding the use of this medication in geriatric patients, including dosage adjustments, safety concerns, or special precautions. Healthcare providers should exercise caution when prescribing this medication to elderly patients, as individual responses may vary. Monitoring for potential adverse effects and therapeutic efficacy is recommended in this population.

Pregnancy

Pregnant patients and those who are breastfeeding should consult a healthcare professional prior to using this medication. It is important to assess the potential risks and benefits, as well as any available data regarding fetal outcomes and lactation. Healthcare providers can offer guidance tailored to individual circumstances, ensuring the safety of both the patient and the developing fetus or nursing infant.

Lactation

Lactating mothers are advised to consult a health professional prior to using this medication. There is currently no available data regarding the excretion of this drug in human breast milk or its effects on breastfed infants. Therefore, caution is recommended when administering this medication to lactating individuals.

Renal Impairment

Patients with renal impairment have no specific information regarding dosage adjustments, special monitoring, or safety considerations provided in the drug insert. Therefore, healthcare professionals should exercise caution when prescribing this medication to individuals with reduced kidney function, as the lack of data necessitates careful clinical judgment.

Hepatic Impairment

Patients with hepatic impairment have not been specifically studied in relation to this medication. Consequently, there are no established dosage adjustments, special monitoring requirements, or precautions outlined for individuals with compromised liver function. It is recommended that healthcare providers exercise caution when prescribing this medication to patients with hepatic impairment, given the lack of data on its safety and efficacy in this population. Regular monitoring of liver function may be prudent in these cases, although specific parameters are not defined in the prescribing information.

Overdosage

In the event of an overdose, it is imperative to seek immediate medical assistance. Healthcare professionals are advised to contact a Poison Control Center at 1-800-222-1222 for guidance on managing the situation effectively.

Prompt intervention is crucial to mitigate potential adverse effects associated with overdose. Symptoms may vary depending on the substance involved, and healthcare providers should be prepared to assess and manage these symptoms accordingly.

Management procedures may include supportive care and symptomatic treatment, tailored to the specific clinical presentation of the patient. Continuous monitoring and evaluation are essential to ensure patient safety and to address any complications that may arise during the course of treatment.

Nonclinical Toxicology

If pregnant or breastfeeding, it is advised to consult a health professional prior to use. No specific non-teratogenic effects have been identified. Additionally, there are no detailed findings related to nonclinical toxicology or animal pharmacology and toxicology available.

Postmarketing Experience

No postmarketing experience details are available in the insert text.

Patient Counseling

Patients should be advised to seek immediate medical assistance or contact a Poison Control Center at 1-800-222-1222 in the event of an overdose. It is important to emphasize that patients must not exceed the recommended dosage.

Healthcare providers should instruct patients to discontinue use and consult a doctor if their cough persists for more than 7 days, recurs, or is accompanied by fever, rash, or a headache that lasts. These symptoms may indicate a more serious underlying condition.

Additionally, patients should be encouraged to consult with their healthcare provider prior to use if they have a persistent or chronic cough, such as that associated with smoking, asthma, chronic bronchitis, or emphysema. They should also seek medical advice if their cough is accompanied by excessive phlegm (mucus).

Storage and Handling

The product is supplied in a configuration that includes a dosing cup. It is essential to store the product at a temperature range of 20-25ºC (68-77ºF) and to avoid refrigeration.

To ensure safety and integrity, the product features a tamper-evident seal; it should not be used if the printed safety seal around or under the cap is broken or missing. After opening, the product must be discarded to maintain safety and efficacy.

Additional Clinical Information

The medication is administered orally, with a recommended dosage of 20 mL every 4 hours for adults and children aged 12 years and older. It is contraindicated for use in children under 12 years of age. There is no additional information available regarding laboratory tests, abuse potential, patient counseling, or postmarketing experience.

Drug Information (PDF)

This file contains official product information for Mucus Relief Dm, including active ingredients, dosage, warnings, and labeling as submitted by the manufacturer for OTC distribution.

View product document (PDF)

Data Generation & Sources

This page was automatically generated and is maintained by the AllDrugs AI Data-Science Team. It was built from the FDA Structured Product Label (DailyMed) for Mucus Relief Dm, retrieved by a validated AI data-extraction workflow.

All FDA-listed dosage forms and strengths are shown in the Packaging & NDC Codes section above. Regulatory status appears in the Summary Information panel above and was verified in the FDA National Drug Code directory and the NSDE NDC Directory daily file.

Note: an automated daemon monitors NSDE checksums; when the record for this NDC changes, the new file is pulled instantly and this page is refreshed.

No human clinician has reviewed this version.

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Primary FDA sources:

Orange Book data shown on this page are limited to Regulatory Status (Rx), Established Pharmacologic Class (EPC), and Mechanism of Action (MoA).

Regulatory data notice: Information on this page is reproduced verbatim from FDA public databases (NSDE, Orange Book, Purple Book, DailyMed SPL). NDA/ANDA drugs are FDA-approved, BLA biologics are FDA-licensed. Inclusion alone does not guarantee current market availability or imply FDA endorsement.

Medical disclaimer: This AI-generated content is provided for educational purposes only and does not constitute medical advice. Always consult a licensed healthcare professional for diagnosis or treatment decisions.