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Guaifenesin/Dextromethorphan hydrobromide

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Active ingredients
  • Guaifenesin 1200 mg
  • Dextromethorphan Hydrobromide 60 mg
Other brand names
Drug classes
Expectorant, Sigma-1 Agonist, Uncompetitive N-methyl-D-aspartate Receptor Antagonist
Dosage form
Tablet, Extended Release
Route
Oral
Prescription status
OTC (over the counter)
Marketed in the U.S.
Since 2017
Label revision date
April 5, 2025
Active ingredients
  • Guaifenesin 1200 mg
  • Dextromethorphan Hydrobromide 60 mg
Other brand names
Drug classes
Expectorant, Sigma-1 Agonist, Uncompetitive N-methyl-D-aspartate Receptor Antagonist
Dosage form
Tablet, Extended Release
Route
Oral
Prescription status
OTC (over the counter)
CSA schedule
Not a scheduled drug
Marketed in the U.S.
Since 2017
Label revision date
April 5, 2025
Manufacturer
Aurohealth LLC
Registration number
ANDA206941
NDC root
58602-825

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Drug Overview

Mucinex DM is a maximum strength medication designed to provide relief from cough and mucus buildup. It contains two active ingredients: dextromethorphan HBr, which acts as a cough suppressant, and guaifenesin, an expectorant that helps loosen phlegm (mucus) and thin bronchial secretions. This combination works to clear your bronchial passageways of bothersome mucus, making coughs more productive and temporarily relieving cough caused by minor throat and bronchial irritation, such as that from the common cold or inhaled irritants.

In addition to helping you clear mucus, Mucinex DM can reduce the intensity of your cough and alleviate the urge to cough, which may help you get a better night's sleep. It is available in extended-release tablet form, allowing for prolonged relief.

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

Dosage and Administration

When taking this medication, it's important to swallow the extended-release tablet whole. Do not crush, chew, or break it, as this can affect how the medicine works. Make sure to take it with a full glass of water, and you can take it at any time, regardless of meals.

For adults and children aged 12 years and older, the recommended dosage is one extended-release tablet every 12 hours. You should not take more than two tablets in a 24-hour period. If you have children under 12 years old, this medication is not suitable for them, so please avoid using it for that age group.

What to Avoid

It's important to follow the instructions provided with your medication carefully. You should not use more than the directed amount, as taking more than recommended can lead to unwanted effects. Always adhere to the dosage guidelines to ensure your safety and the effectiveness of the treatment.

If you have any questions or concerns about your medication, don't hesitate to reach out to your healthcare provider for guidance. Your health and well-being are the top priority.

Side Effects

You should be aware that this medication is not recommended for children under 12 years of age. Additionally, if you are currently taking or have recently stopped a prescription monoamine oxidase inhibitor (MAOI)—a type of medication used for depression or certain other conditions—you should avoid using this product.

If your cough lasts more than 7 days, returns, or is accompanied by fever, rash, or a persistent headache, it’s important to stop using the medication and consult a doctor, as these symptoms may indicate a more serious health issue. Before using this product, 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.

Warnings and Precautions

You should not use this medication if you are under 12 years old. Additionally, avoid taking it if you are currently on a prescription monoamine oxidase inhibitor (MAOI), which is a type of medication used for depression or certain psychiatric conditions. If you have recently stopped taking an MAOI, wait at least two weeks before using this product. If you're unsure whether your medication contains an MAOI, please consult your doctor or pharmacist.

In case of an overdose, it’s crucial to seek emergency medical help immediately or contact a Poison Control Center at 1-800-222-1222. You should also stop using this medication and call your doctor if your cough lasts more than seven days, returns, or occurs alongside a fever, rash, or persistent headache, as these may indicate a more serious health issue.

Overdose

If you suspect an overdose, it's important to stay calm and take immediate action. While there are no specific details about overdose symptoms or treatment in the provided information, general signs of an overdose can include unusual drowsiness, confusion, or difficulty breathing. If you notice any of these symptoms or feel concerned, seek medical help right away.

In case of an overdose, contacting a healthcare professional or poison control center is crucial. They can provide guidance on what steps to take next. Always err on the side of caution—if you are unsure, it's better to seek help sooner rather than later.

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 considering this medication for children. You should not use it for anyone under 12 years of age. For those 12 years and older, the recommended dosage is one tablet every 12 hours, with a maximum of two tablets in a 24-hour period. Always follow these guidelines to ensure the safety and well-being of your child.

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 if you or a loved one is an older adult considering this medication, it’s important to consult with a healthcare provider. They can help determine the best approach based on individual health needs and any other medications being taken. Always prioritize open communication with your healthcare team to ensure safe and effective treatment.

Renal Impairment

If you have kidney issues, it's important to know that there are no specific guidelines or dosage adjustments mentioned for your condition in the available information. This means that the standard recommendations for the medication do not include special monitoring or safety considerations tailored for patients with renal impairment (kidney problems).

Always consult your healthcare provider for personalized advice and to ensure that any medication you take is safe and appropriate for your kidney health. They can provide guidance based on your individual situation.

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 crucial to talk to your healthcare provider about any medications you are currently taking or planning to take. For instance, you should not use this medication if you are currently on a monoamine oxidase inhibitor (MAOI), which is a type of drug often prescribed for depression, certain psychiatric conditions, or Parkinson’s disease. Additionally, you need to wait at least two weeks after stopping an MAOI before starting this medication.

Discussing your full medication list with your healthcare provider helps ensure your safety and the effectiveness of your treatment. Always prioritize open communication about your health to avoid potentially harmful interactions.

Storage and Handling

To ensure the best performance of your product, store it at a temperature between 20° to 25°C (68° to 77°F). This temperature range helps maintain the product's effectiveness and safety.

When handling the product, make sure to do so in a clean environment to avoid contamination. Always follow any specific instructions provided for use and disposal to ensure safety and compliance.

Additional Information

You should take this medication orally, with adults and children aged 12 years and older advised to take 1 tablet every 12 hours, not exceeding 2 tablets in a 24-hour period. If you are under 12 years old, do not use this medication.

If you are pregnant or breastfeeding, consult a healthcare professional before using this medication. Always keep it out of reach of children. In the event of an overdose, seek medical help immediately or contact a Poison Control Center at 1-800-222-1222.

FAQ

What is Mucinex DM used for?

Mucinex DM helps loosen phlegm (mucus) and thin bronchial secretions, making coughs more productive. It temporarily relieves cough due to minor throat and bronchial irritation.

What are the active ingredients in Mucinex DM?

Mucinex DM contains Dextromethorphan HBr (60 mg), a cough suppressant, and Guaifenesin (1200 mg), an expectorant.

How should I take Mucinex DM?

Take 1 extended-release tablet every 12 hours with a full glass of water. Do not exceed 2 tablets in 24 hours.

Who should not use Mucinex DM?

Do not use Mucinex DM if you are under 12 years of age or if you are currently taking a prescription monoamine oxidase inhibitor (MAOI).

What should I do if my cough lasts more than 7 days?

Stop using Mucinex DM and ask a doctor if your cough lasts more than 7 days, comes back, or occurs with fever, rash, or persistent headache.

Is Mucinex DM safe to use during pregnancy or breastfeeding?

If you are pregnant or breastfeeding, ask a health professional before using Mucinex DM.

What are the storage conditions for Mucinex DM?

Store Mucinex DM at 20° to 25°C (68° to 77°F).

What should I do in case of an overdose?

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

Packaging Info

Below are the non-prescription pack sizes of Guaifenesin and Dextromethorphan Hbr. Columns show Packaging, Formulation Type, and Active Ingredient Strength.

Packaging configurations for Guaifenesin and Dextromethorphan Hbr.
Details

Drug Information (PDF)

This file contains official product information for Guaifenesin and Dextromethorphan Hbr, including active ingredients, dosage, warnings, and labeling as submitted by the manufacturer for OTC distribution.

View product document (PDF)

Description

NDC 58602-825-06 identifies this product as Maximum Strength Mucus Relief DM, manufactured by Primary Health. Each extended-release tablet contains 60 mg of Dextromethorphan HBr, a cough suppressant, and 1200 mg of Guaifenesin, an expectorant. The formulation is designed to relieve cough and chest congestion by controlling cough and thinning and loosening mucus. The product is available in a package containing 42 tablets, with a dosing regimen that provides relief for up to 12 hours.

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 assists in loosening phlegm (mucus) and thinning bronchial secretions, thereby facilitating the expulsion of bothersome mucus and enhancing the productivity of coughs.

Additionally, this drug temporarily alleviates the intensity of coughing and reduces the impulse to cough, which may aid in promoting sleep.

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

Dosage and Administration

The extended-release tablet should be taken with a full glass of water. It is important to note that the tablet must not be crushed, chewed, or broken, as this may affect the release mechanism of the medication.

For adults and children aged 12 years and older, the recommended dosage is one extended-release tablet every 12 hours. The total daily dosage should not exceed two extended-release tablets within a 24-hour period. This medication can be administered without regard to the timing of meals.

Use of this product is not recommended for children under 12 years of age.

Contraindications

There are no specific contraindications identified for this product. However, it is advised that the product should not be used in excess of the directed dosage.

Warnings and Precautions

Patients should not use this product in individuals under 12 years of age. The use of this medication is contraindicated in patients 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 2 weeks following the discontinuation of an MAOI. If there is uncertainty regarding the presence of an MAOI in a prescription medication, it is imperative to consult a healthcare professional, such as a doctor or pharmacist, prior to use.

In the event of an overdose, immediate medical assistance should be sought. Patients are advised to contact a Poison Control Center at 1-800-222-1222 without delay.

Patients should discontinue use and consult a healthcare provider if a cough persists for more than 7 days, recurs, or is accompanied by fever, rash, or a persistent headache. 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 this product. Serious adverse reactions may occur, and it is crucial to discontinue use and consult a healthcare professional if a cough persists for more than 7 days, returns, or is accompanied by fever, rash, or a persistent headache, as these symptoms could indicate a serious underlying condition.

This product is contraindicated for use in children under 12 years of age. Additionally, it should not be used in conjunction with prescription monoamine oxidase inhibitors (MAOIs) or within 2 weeks of discontinuing such medications, which are often prescribed for depression, psychiatric or emotional conditions, or Parkinson’s disease. Patients uncertain about whether their prescription contains an MAOI are advised to consult a doctor or pharmacist prior to use.

Before using this product, patients should seek medical advice if they have a persistent or chronic cough, such as that associated with smoking, asthma, chronic bronchitis, or emphysema, or if their cough is accompanied by excessive phlegm (mucus).

Drug Interactions

The concomitant use of this medication with prescription monoamine oxidase inhibitors (MAOIs) is contraindicated. MAOIs are typically prescribed for the treatment of depression, psychiatric or emotional conditions, and Parkinson’s disease. Patients should not initiate therapy with this medication while currently on an MAOI or within 2 weeks of discontinuing an MAOI.

Monitoring for adverse effects is advised if there is a potential overlap in treatment timelines, as the interaction may lead to serious clinical consequences.

Packaging & NDC

Below are the non-prescription pack sizes of Guaifenesin and Dextromethorphan Hbr. Columns show Packaging, Formulation Type, and Active Ingredient Strength.

Packaging configurations for Guaifenesin and Dextromethorphan Hbr.
Details

Pediatric Use

Pediatric patients under 12 years of age should not use this medication. For adolescents aged 12 years and older, the recommended dosage is 1 tablet every 12 hours, with a maximum of 2 tablets in a 24-hour period. Caution is advised when prescribing to younger populations, as safety and efficacy have not been established in children under 12.

Geriatric Use

There is no specific information available 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. The potential risks and benefits must be carefully weighed, as the effects on fetal outcomes and lactation are not fully established. It is essential for women of childbearing potential to seek medical advice to ensure safe use during pregnancy and lactation.

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

There is no specific information available regarding dosage adjustments, special monitoring, or safety considerations for patients with renal impairment. Healthcare professionals should exercise caution when prescribing to patients with reduced kidney function, as the absence of detailed guidance necessitates careful clinical judgment. Regular monitoring of renal function may be advisable in these patients to ensure safety and efficacy.

Hepatic Impairment

Patients with hepatic impairment have not been specifically studied in relation to the use of 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 available information.

Overdosage

There is currently no specific information available regarding overdosage in the provided sections of the Summary of Product Characteristics (SPL).

In the absence of detailed overdosage data, healthcare professionals are advised to monitor patients closely for any unusual symptoms or adverse effects that may arise following the administration of the medication.

In the event of suspected overdosage, it is recommended that healthcare providers implement standard supportive measures. This may include symptomatic treatment and monitoring of vital signs.

Healthcare professionals should also consider consulting a poison control center or a medical toxicologist for guidance on the management of potential overdosage cases.

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 in the available data. Additionally, there are no detailed findings regarding nonclinical toxicology or animal pharmacology and toxicology provided in the current information.

Postmarketing Experience

Reports of side effects have been received through voluntary submissions and surveillance programs. Healthcare professionals and patients are encouraged to report any adverse events to the designated contact number provided for this purpose.

Patient Counseling

Healthcare providers should advise patients 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 inform patients that they should discontinue use and consult a doctor if their cough persists for more than 7 days, returns after improvement, or is accompanied by symptoms such as fever, rash, or a persistent headache, as these may indicate a serious underlying condition.

Patients should be instructed to adhere strictly to the recommended dosage and not exceed the directed amount while using this product. Additionally, healthcare providers should encourage patients to consult with a doctor prior to use if they have a persistent or chronic cough, particularly if it is associated with smoking, asthma, chronic bronchitis, or emphysema. Furthermore, patients should be advised to seek medical guidance if their cough is accompanied by excessive phlegm (mucus).

Storage and Handling

The product is supplied in various package configurations, with specific NDC numbers available for identification. It is essential to store the product at a controlled temperature range of 20° to 25°C (68° to 77°F) to maintain its integrity and efficacy. Proper storage conditions must be adhered to, ensuring that the product is kept in a suitable container that protects it from environmental factors. Special handling requirements should be followed to prevent any compromise to the product's quality.

Additional Clinical Information

The medication is administered orally, with a recommended dosage of one tablet every 12 hours for adults and children aged 12 years and older, not exceeding two tablets within a 24-hour period. It is contraindicated for children under 12 years of age.

Clinicians should counsel patients to consult a healthcare professional if they are pregnant or breastfeeding. Additionally, it is important to keep the medication out of reach of children. In the event of an overdose, patients should seek medical assistance or contact a Poison Control Center immediately at 1-800-222-1222.

Drug Information (PDF)

This file contains official product information for Guaifenesin and Dextromethorphan Hbr, 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 Guaifenesin and Dextromethorphan Hbr, 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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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.