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Guaifenesin/Dextromethorphan hydrobromide

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Active ingredients
  • Guaifenesin 400 mg
  • Dextromethorphan Hydrobromide 20 mg
Other brand names
Drug classes
Expectorant, Sigma-1 Agonist, Uncompetitive N-methyl-D-aspartate Receptor Antagonist
Dosage form
Capsule, Liquid Filled
Route
Oral
Prescription status
OTC (over the counter)
Marketed in the U.S.
Since 2025
Label revision date
July 11, 2025
Active ingredients
  • Guaifenesin 400 mg
  • Dextromethorphan Hydrobromide 20 mg
Other brand names
Drug classes
Expectorant, Sigma-1 Agonist, Uncompetitive N-methyl-D-aspartate Receptor Antagonist
Dosage form
Capsule, Liquid Filled
Route
Oral
Prescription status
OTC (over the counter)
CSA schedule
Not a scheduled drug
Marketed in the U.S.
Since 2025
Label revision date
July 11, 2025
Manufacturer
Softgel Healthcare Pvt Ltd
Registration number
M012
NDC root
35916-0759

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

Drug Overview

Guaifen 400mg and dextro 20mg is a combination medication designed to temporarily relieve cough caused by minor throat and bronchial irritation, which can occur with a cold. This medication works by loosening phlegm (mucus) and thinning bronchial secretions, helping to clear the bronchial passageways of bothersome mucus and making coughs more productive.

By addressing both the irritation and the mucus buildup, this medication can help you feel more comfortable when dealing with a cough associated with a cold.

Uses

You can use this medication to temporarily relieve a cough caused by minor irritation in your throat and bronchial tubes, which often happens with a cold. It also helps to loosen phlegm (mucus) and thin out bronchial secretions, making it easier for you to clear out bothersome mucus and have more productive coughs. This can provide you with some comfort when you're feeling under the weather.

Dosage and Administration

When taking this medication, it's important to follow the recommended dosage to ensure safety and effectiveness. If you are an adult or a child aged 12 years and older, you should take one softgel every four hours. However, make sure not to exceed six doses within a 24-hour period.

To help the medication work properly, take each softgel with a full glass of water. If you have a child under 12 years of age, please do not use this medication for them. Always adhere to these guidelines to ensure the best results.

What to Avoid

You should avoid using this product if you are currently taking a prescription monoamine oxidase inhibitor (MAOI), which are medications often prescribed for depression, psychiatric conditions, or Parkinson's disease. Additionally, you should not use this product for two weeks after stopping an MAOI. If you're unsure whether your medication contains an MAOI, please consult your doctor or pharmacist.

It's also important to follow the recommended dosage and not exceed it. This product should not be used for more than seven days. Taking these precautions can help ensure your safety and well-being.

Side Effects

If you experience a cough that lasts more than 7 days, comes back frequently, or is accompanied by symptoms like fever, rash, or a persistent headache, it could indicate a more serious health issue. It's important to pay attention to these signs and consult a healthcare professional.

Additionally, if your cough is accompanied by excessive phlegm (mucus) or is persistent due to conditions like smoking, asthma, chronic bronchitis, or emphysema, you should seek medical advice. These symptoms may require further evaluation and management.

Warnings and Precautions

It's important to be cautious when using this product. You should not take it if you are currently using a prescription monoamine oxidase inhibitor (MAOI), which is a type of medication often prescribed 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.

In case of an accidental overdose, seek emergency medical help or contact a Poison Control Center immediately. Additionally, if your cough lasts more than seven days, comes back, or is accompanied by symptoms like fever, rash, or a persistent headache, stop using the product and call your doctor, 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 is no specific information available about the signs of overdose for this medication, general symptoms can include unusual drowsiness, confusion, or difficulty breathing. If you notice any of these signs, or if you are unsure, seek medical help right away.

In case of an overdose, contact your local emergency services or go to the nearest hospital. It's always better to be safe and get checked by a healthcare professional if you have any concerns about your health. Remember, timely intervention can make a significant difference.

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 one softgel every four hours, but be sure not to exceed six doses in a 24-hour period. Additionally, you should not use this medication for more than seven consecutive days.

Always keep this medication out of reach of younger children. If there is an accidental overdose, seek medical help or contact a Poison Control Center immediately. Your child's safety is the top priority, so please follow these guidelines carefully.

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. Since older adults may have different health needs and responses to medications, you should always consult with a healthcare provider before starting any new medication. They can help determine the right dosage and monitor for any potential side effects, ensuring that the treatment is safe and effective for you or your loved one.

Renal Impairment

If you have kidney problems, 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 usual recommendations for monitoring or safety considerations related to renal impairment (kidney issues) are not provided.

It's always best to consult with your healthcare provider about your specific situation, as they can offer personalized advice and ensure that any medications you take are safe and effective for you.

Hepatic Impairment

If you have liver problems, 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 apply, but you should always consult your healthcare provider for personalized advice. They can help determine the best approach for your treatment and monitor your liver function as needed.

Make sure to keep your doctor informed about your liver health, as they may want to conduct regular tests to ensure your safety while using any medication. Your well-being is a priority, so don't hesitate to ask questions or express any concerns you may have.

Drug Interactions

It's important to be cautious about combining medications. If you are currently taking a prescription monoamine oxidase inhibitor (MAOI), which is a type of medication used for depression, psychiatric conditions, or Parkinson's disease, you should not use this product. Additionally, you should wait at least two weeks after stopping an MAOI before starting this medication. If you're unsure whether your current prescription includes an MAOI, please consult your doctor or pharmacist for clarification.

Always discuss any medications you are taking with your healthcare provider to ensure your safety and avoid potentially harmful interactions. Your health is a priority, and your provider can help you make informed decisions about your treatment options.

Storage and Handling

To ensure the best performance of your product, store it at room temperature, ideally around 25°C (77°F). It can safely be kept in a range from 15°C to 30°C (59°F to 86°F), but avoid exposing it to heat or moisture. Keeping the product in a dry place will help maintain its quality and effectiveness.

When handling the product, be mindful of its storage conditions to prevent any damage. Always ensure that it is kept away from extreme temperatures and humidity. Following these guidelines will help you use the product safely and effectively.

Additional Information

No further information is available.

FAQ

What is guaifen 400mg and dextro 20mg used for?

It temporarily relieves cough due to minor throat and bronchial irritation, helping to loosen phlegm (mucus) and thin bronchial secretions.

How should I take guaifen 400mg and dextro 20mg?

Adults and children 12 years and older should take 1 softgel every 4 hours with a full glass of water, not exceeding 6 doses in 24 hours.

Are there any age restrictions for using this medication?

Do not use this medication in children under 12 years of age.

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

Stop use and consult a doctor if your cough lasts more than 7 days, recurs, or is accompanied by fever, rash, or persistent headache.

Can I use this medication if I am taking a monoamine oxidase inhibitor (MAOI)?

No, do not use this medication if you are currently taking an MAOI or have stopped taking one within the last 2 weeks.

What should I do in case of an accidental overdose?

Get medical help or contact a Poison Control Center immediately.

Is it safe to use guaifen 400mg and dextro 20mg during pregnancy or breastfeeding?

If you are pregnant or breastfeeding, consult a health professional before use.

How should I store this medication?

Store at 25°C (77°F) and keep in a dry place, avoiding exposure to heat.

Packaging Info

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

Packaging configurations for Guaifenesin, Dextromethorphan Hbr.
Details

Drug Information (PDF)

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

View product document (PDF)

Description

Guaifenesin is present at a dosage of 400 mg, while dextromethorphan is included at 20 mg. The formulation combines these active ingredients to provide therapeutic effects. Guaifenesin serves as an expectorant, facilitating the clearance of mucus from the airways, while dextromethorphan acts as a cough suppressant. The specific roles of these components contribute to the overall efficacy of the product in managing symptoms associated with respiratory conditions.

Uses and Indications

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

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

Dosage and Administration

Adults and children 12 years of age and over are instructed to take 1 softgel every 4 hours as needed. It is essential that the total number of doses does not exceed 6 doses within a 24-hour period. The softgel should be taken with a full glass of water to ensure proper swallowing and absorption.

Children under 12 years of age should not use this medication.

Contraindications

Use of this product is contraindicated in the following situations:

Patients currently taking a prescription monoamine oxidase inhibitor (MAOI) for depression, psychiatric, or emotional conditions, or Parkinson's disease, or within 2 weeks of discontinuing an MAOI. Due to the potential for serious interactions, it is essential to consult a healthcare professional if there is uncertainty regarding the presence of an MAOI in the prescribed medication.

Additionally, the product should not be used in excess of the recommended dosage or for a duration exceeding 7 days.

Warnings and Precautions

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

General precautions must be observed, particularly regarding the concurrent use of prescription medications. This product should not be administered to individuals currently taking a monoamine oxidase inhibitor (MAOI), which includes certain medications prescribed for depression, psychiatric disorders, emotional conditions, or Parkinson's disease. Furthermore, it is essential to refrain from using this product for at least two weeks following the cessation of an MAOI. Healthcare professionals should advise patients to consult with a doctor or pharmacist if there is any uncertainty regarding the presence of an MAOI in their prescription medications.

In the event of an accidental overdose, immediate medical assistance should be sought. Patients or caregivers are advised to contact a Poison Control Center without delay.

Healthcare professionals should instruct patients to discontinue use and seek medical advice if a cough persists for more than seven days, recurs, or is accompanied by additional symptoms such as fever, rash, or a persistent headache. These symptoms may indicate a more serious underlying condition that requires further evaluation.

Side Effects

Patients should be aware that a cough lasting more than 7 days, recurring, or accompanied by fever, rash, or persistent headache may indicate a serious underlying condition that requires medical evaluation.

In addition, patients may experience a cough that is accompanied by excessive phlegm (mucus). It is important to note that persistent or chronic coughs, such as those associated with smoking, asthma, chronic bronchitis, or emphysema, may also occur. These conditions warrant further assessment and management by healthcare professionals.

Drug Interactions

The concomitant use of this product with prescription monoamine oxidase inhibitors (MAOIs) is contraindicated. MAOIs are typically prescribed for the treatment of depression, certain psychiatric conditions, or Parkinson's disease. Patients should not take this product while on MAOIs or for a minimum of two weeks following the discontinuation of an MAOI.

It is essential for patients to consult with a healthcare professional, such as a doctor or pharmacist, to verify whether their current prescription includes an MAOI before initiating treatment with this product.

Packaging & NDC

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

Packaging configurations for Guaifenesin, 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 softgel every 4 hours, with a maximum of 6 doses in a 24-hour period. The duration of use should not exceed 7 days.

Healthcare professionals should advise caregivers to keep the medication out of reach of children. In the event of an accidental overdose, immediate medical assistance should be sought, or contact with a Poison Control Center is recommended.

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 the safety of both the mother and the developing fetus.

Lactation

Lactating mothers are advised to consult a health professional prior to using this medication. There is currently no available data on 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 this patient population.

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

In the absence of specific information regarding overdosage, healthcare professionals are advised to exercise caution and adhere to general principles of management in cases of suspected overdose.

It is essential to monitor the patient closely for any potential symptoms that may arise, as the lack of detailed overdosage data necessitates a vigilant approach. Symptoms may vary depending on the substance involved and the individual patient's response.

In the event of an overdose, immediate medical attention should be sought. Healthcare providers should implement standard supportive measures, which may include maintaining airway patency, providing supplemental oxygen, and ensuring adequate circulation.

Additionally, it is recommended to contact a poison control center or consult relevant toxicology resources for guidance on specific management strategies tailored to the situation. Continuous assessment and supportive care are critical in managing any adverse effects that may occur due to an overdose.

Nonclinical Toxicology

No teratogenic or non-teratogenic effects have been reported in the available nonclinical studies. Additionally, there is no information regarding animal pharmacology and toxicology. The absence of data limits the assessment of potential risks associated with the use of the compound in these contexts.

Postmarketing Experience

No postmarketing experience details are available in the insert text.

Patient Counseling

Healthcare providers should advise patients to keep this product out of reach of children to prevent accidental ingestion. In the event of an accidental overdose, patients should be instructed to seek medical help or contact a Poison Control Center immediately.

Patients should be informed that this product should not be used if they are currently taking a prescription monoamine oxidase inhibitor (MAOI) or within 2 weeks of stopping such medication. If patients are uncertain whether their prescription includes an MAOI, they should be encouraged to consult with their doctor or pharmacist prior to using this product.

Healthcare providers should counsel patients to discontinue use and seek medical advice if their cough persists for more than 7 days, recurs, or is accompanied by symptoms such as fever, rash, or a persistent headache, as these may indicate a serious condition.

It is important to remind patients not to exceed the recommended dosage while using this product and to limit use to no more than 7 days. Additionally, patients should be advised to consult a doctor before using this product if they have a cough that is accompanied by excessive phlegm (mucus) or if they have a persistent or chronic cough associated with smoking, asthma, chronic bronchitis, or emphysema.

Storage and Handling

The product is supplied in various package configurations, with specific NDC numbers available upon request. It should be stored at a controlled room temperature of 25°C (77°F), with permissible excursions between 15°C and 30°C (59°F and 86°F).

It is essential to keep the product in a dry place and to avoid exposure to heat to maintain its integrity and efficacy. Proper handling and storage conditions are crucial for ensuring the product's quality throughout its shelf life.

Additional Clinical Information

No further data are available.

Drug Information (PDF)

This file contains official product information for Guaifenesin, 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, 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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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.