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Mucus Relief Congestion Cough

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Active ingredients
  • Guaifenesin 400 mg/20 mL
  • Dextromethorphan Hydrobromide 20 mg/20 mL
  • Phenylephrine Hydrochloride 10 mg/20 mL
Other brand names
Drug classes
Expectorant, Sigma-1 Agonist, Uncompetitive N-methyl-D-aspartate Receptor Antagonist, alpha-1 Adrenergic Agonist
Dosage form
Liquid
Route
Oral
Prescription status
OTC (over the counter)
Marketed in the U.S.
Since 2018
Label revision date
March 23, 2026
Active ingredients
  • Guaifenesin 400 mg/20 mL
  • Dextromethorphan Hydrobromide 20 mg/20 mL
  • Phenylephrine Hydrochloride 10 mg/20 mL
Other brand names
Drug classes
Expectorant, Sigma-1 Agonist, Uncompetitive N-methyl-D-aspartate Receptor Antagonist, alpha-1 Adrenergic Agonist
Dosage form
Liquid
Route
Oral
Prescription status
OTC (over the counter)
CSA schedule
Not a scheduled drug
Marketed in the U.S.
Since 2018
Label revision date
March 23, 2026
Manufacturer
Dolgencorp, Inc. (DOLLAR GENERAL & REXALL)
Registration number
M012
NDC root
55910-537

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Drug Overview

Maximum Strength Mucinex® Fast-Max® Severe Congestion & Cough is a fast-acting medication designed to provide relief from multiple symptoms associated with colds, including severe congestion and cough. It works by helping to loosen phlegm (mucus) and thin bronchial secretions, making it easier to clear mucus from your airways and allowing for more productive coughing.

This product contains three active ingredients: dextromethorphan HBr, which acts as a cough suppressant; guaifenesin, an expectorant that helps clear mucus; and phenylephrine HCl, a nasal decongestant that alleviates nasal congestion. It is intended for individuals aged 12 and over and can temporarily relieve cough due to minor throat and bronchial irritation, as well as help reduce the impulse to cough, making it easier for you to rest.

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 a cough caused by minor throat and bronchial irritation, which can happen with the common cold or from inhaling irritants. It can reduce the intensity of your cough and help control the urge to cough, making it easier for you to get a good night's sleep. Additionally, it can help relieve nasal congestion associated with a cold.

Dosage and Administration

It's important to follow the correct dosage when using this medication to ensure your safety and effectiveness. For adults and children aged 12 years and older, you should take 20 mL (milliliters) using the dosing cup provided every 4 hours. Make sure to shake the bottle well before each use to mix the medication properly.

You should not take more than 6 doses within a 24-hour period, and it's crucial to only use the dosing cup that comes with the product—do not use any other measuring devices. If you have children under 12 years of age, this medication is not recommended for them. Always keep the dosing cup with the product for easy access.

What to Avoid

You should avoid using this medication if you are under 12 years of age. Additionally, do not take it if you are currently on a prescription monoamine oxidase inhibitor (MAOI), which is a type of medication used for depression, psychiatric conditions, or Parkinson's disease, or for two weeks after stopping an MAOI. If you're unsure whether your prescription includes an MAOI, please consult your doctor or pharmacist.

It's also important to follow the dosage instructions carefully and not exceed the recommended amount. Taking more than directed can lead to serious health issues. Always prioritize your safety and well-being by adhering to these guidelines.

Side Effects

If you experience nervousness, dizziness, or trouble sleeping while using this medication, it's important to stop taking it and consult your doctor. Additionally, if your symptoms do not improve within 7 days, or if they are accompanied by a fever, you should seek medical advice. A returning cough, especially if it comes with fever, rash, or a persistent headache, may indicate a more serious condition that requires attention.

Warnings and Precautions

You should not use this medication if you are under 12 years old or if you are currently taking a prescription monoamine oxidase inhibitor (MAOI), which is a type of medication used for depression or certain other 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.

Before using this medication, it's important to talk to your doctor if you have any of the following conditions: heart disease, high blood pressure, thyroid disease, diabetes, difficulty urinating due to an enlarged prostate, or a chronic cough related to smoking, asthma, or other lung issues. If you experience an overdose, seek emergency medical help immediately or contact a Poison Control Center at 1-800-222-1222.

You should stop using this medication and call your doctor if you experience nervousness, dizziness, or trouble sleeping. Additionally, if your symptoms do not improve within seven days, or if you develop a cough with fever, rash, or a persistent headache, these could indicate a more serious issue that requires medical attention.

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 know that this medication is not recommended for children under 12 years of age. If you have a child in this age group, please avoid using this medication. Always consult with your healthcare provider for safe alternatives and guidance tailored to your child's needs.

Geriatric Use

While there is no specific information available about the use of this medication in older adults, it’s important to approach any new treatment with caution. If you or a loved one is an older adult, it’s always a good idea to discuss any medications with a healthcare provider. They can help ensure that the treatment is safe and appropriate, considering any unique health needs or conditions that may be present.

Since there are no dosage adjustments or special precautions mentioned for elderly patients, your healthcare provider will be the best resource for personalized advice. Always keep them informed about any other medications or health issues to help manage your overall care effectively.

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 may affect you 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 kidney health. They can help monitor your condition and make any necessary adjustments to your treatment plan.

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).

Before starting any new medication, including this one, it's essential to discuss your liver health with your healthcare provider. They can help determine the best approach for your treatment and ensure your safety.

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 performance of your product, store it at room temperature, specifically between 20-25ºC (68-77ºF). It's important to avoid refrigeration, as this can affect the product's effectiveness.

When handling the product, make sure to do so in a clean environment to maintain its integrity. Always follow any additional safety instructions provided to ensure safe and effective use.

Additional Information

You should take this medication orally, using the dosing cup provided. For adults and children aged 12 and older, the recommended dose is 20 mL every 4 hours, but do not exceed 6 doses in a 24-hour period.

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

FAQ

What is Maximum Strength Mucinex® Fast-Max® Severe Congestion & Cough used for?

It is used for mucus relief, severe congestion, and cough, providing multi-symptom relief.

What are the active ingredients in this medication?

The active ingredients include Dextromethorphan HBr (cough suppressant), Guaifenesin (expectorant), and Phenylephrine HCl (nasal decongestant).

Who should use this product?

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

How should I take Maximum Strength Mucinex® Fast-Max®?

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

What should I do if I experience side effects?

Stop use and ask a doctor if you experience nervousness, dizziness, sleeplessness, or if symptoms do not improve within 7 days.

Are there any contraindications for this medication?

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

What precautions should I take before using this product?

Consult a doctor if you have heart disease, high blood pressure, thyroid disease, diabetes, or a chronic cough.

What should I do in case of overdose?

In case of overdose, get medical help or contact a Poison Control Center immediately.

Can I use this medication if I am pregnant or breastfeeding?

If pregnant or breastfeeding, ask a health professional before use.

How should I store this medication?

Store between 20-25ºC (68-77ºF) and do not refrigerate.

Packaging Info

Below are the non-prescription pack sizes of Mucus Relief Congestion Cough (dextromethorphan hydrobromide, guaifenesin, phenylephrine hydrochloride). Columns show Packaging, Formulation Type, and Active Ingredient Strength.

Packaging configurations for Mucus Relief Congestion Cough.
Details

Drug Information (PDF)

This file contains official product information for Mucus Relief Congestion Cough, 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 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 relieves the intensity of coughing and the impulse to cough, which may aid in promoting sleep. It also addresses nasal congestion associated with colds.

Limitations of use include the absence of specific indications for chronic cough or cough associated with smoking, asthma, or emphysema. This drug should be used as directed and is not intended for long-term management of cough.

Dosage and Administration

Healthcare professionals should advise patients to adhere to the following dosage and administration guidelines.

For adults and children aged 12 years and older, the recommended dose is 20 mL, to be measured using the dosing cup provided, every 4 hours as needed. It is imperative that no more than 6 doses are taken within a 24-hour period.

For children under 12 years of age, the product is not recommended for use.

Prior to administration, the product must be shaken well. The dosing cup should be kept with the product and only this cup should be used for measuring the dose; no other dosing devices should be utilized.

Contraindications

Use of this product is contraindicated in the following situations:

Children under 12 years of age should not use this product due to safety concerns related to its effects in this age group.

The product is contraindicated in patients currently taking a prescription monoamine oxidase inhibitor (MAOI) or within 2 weeks of discontinuing an MAOI. This is due to the potential for serious interactions that may occur with the use of MAOIs, which are commonly prescribed for depression, psychiatric or emotional conditions, or Parkinson's disease. Patients should consult a healthcare professional if uncertain about the presence of an MAOI in their current medication regimen.

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

Warnings and Precautions

The use of this product is contraindicated in children under 12 years of age. Additionally, it must not be administered to individuals currently taking a prescription monoamine oxidase inhibitor (MAOI) or within two weeks of discontinuing such medication. MAOIs are commonly prescribed for depression, psychiatric or emotional conditions, and Parkinson's disease. If there is uncertainty regarding the presence of an MAOI in a prescription medication, consultation with a healthcare professional is advised prior to use.

Healthcare professionals should exercise caution and recommend that patients consult a physician before using this product if they have any of the following conditions: heart disease, high blood pressure, thyroid disease, diabetes, difficulty urinating due to an enlarged prostate gland, or a persistent or chronic cough associated with smoking, asthma, chronic bronchitis, or emphysema. Furthermore, patients with a cough that produces excessive phlegm (mucus) should also seek medical advice prior to use.

In the event of an overdose, immediate medical assistance should be sought, or the Poison Control Center (1-800-222-1222) should be contacted without delay.

Patients are advised to discontinue use and consult a healthcare provider if they experience nervousness, dizziness, or sleeplessness. Additionally, if symptoms do not improve within seven days, or if they are accompanied by fever, or if a cough recurs or presents with fever, rash, or a persistent headache, medical evaluation is warranted, as these may indicate a serious underlying condition.

Side Effects

Patients should discontinue use and consult a healthcare professional if they experience nervousness, dizziness, or sleeplessness. Additionally, if symptoms do not improve within 7 days or are accompanied by fever, or if a cough recurs or occurs with fever, rash, or a persistent headache, these may indicate a serious condition requiring medical attention.

Drug Interactions

There are currently no documented drug interactions associated with 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 Congestion Cough (dextromethorphan hydrobromide, guaifenesin, phenylephrine hydrochloride). Columns show Packaging, Formulation Type, and Active Ingredient Strength.

Packaging configurations for Mucus Relief Congestion Cough.
Details

Pediatric Use

Pediatric patients under 12 years of age should not be administered this medication. There are no established safety or efficacy profiles for this age group, and its use is contraindicated in children younger than 12 years. Healthcare professionals are advised to consider alternative treatments for pediatric patients within this age range.

Geriatric Use

Elderly patients may not have specific information regarding the use of this medication, including dosage adjustments, safety concerns, or special precautions. Therefore, healthcare providers should exercise caution when prescribing this medication to geriatric patients. It is advisable to monitor these patients closely for any adverse effects or changes in therapeutic response, given the lack of targeted data for 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 medication 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 absence of guidance necessitates careful clinical judgment.

Hepatic Impairment

Patients with hepatic impairment have not been specifically studied in relation to this medication. Consequently, there are no 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 as they arise.

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 develop 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 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

No postmarketing experience details are available in the insert text.

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

Patients should be cautioned against using this product if they are currently taking a prescription monoamine oxidase inhibitor (MAOI) or have stopped taking an MAOI drug within the last two weeks. If patients are uncertain whether their prescription medication contains an MAOI, they should be encouraged to consult with their doctor or pharmacist prior to use.

Healthcare providers should instruct patients to discontinue use and consult a doctor if they experience nervousness, dizziness, or sleeplessness. Additionally, patients should be advised to stop using the product and seek medical advice if their symptoms do not improve within 7 days or if they experience symptoms accompanied by fever. They should also be informed to stop use and contact a doctor if a cough returns or occurs with fever, rash, or a persistent headache, as these may indicate a serious condition.

While using this product, patients must be reminded not to exceed the recommended dosage. Healthcare providers should encourage patients to consult a doctor before use if they have any of the following conditions: heart disease, high blood pressure, thyroid disease, diabetes, difficulty urinating due to an enlarged prostate gland, or a persistent or chronic cough associated with smoking, asthma, chronic bronchitis, or emphysema. Furthermore, patients should be advised to seek medical advice if they have a cough that produces 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 temperature range of 20-25ºC (68-77ºF). Refrigeration is not recommended, as it may compromise the integrity of the product. Proper storage conditions must be maintained to ensure optimal efficacy and safety.

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. Patients should not exceed 6 doses within a 24-hour period.

Clinicians should counsel patients to consult a health professional if they are pregnant or breastfeeding before use. It is crucial to keep the medication out of reach of children, and 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 Mucus Relief Congestion Cough, 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 Congestion Cough, 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.