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Dextromethorphan hydrobromide/Guaifenesin

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Active ingredients
  • Guaifenesin 100 mg/5 mL
  • Dextromethorphan Hydrobromide 10 mg/5 mL
Other brand names
Drug classes
Expectorant, Sigma-1 Agonist, Uncompetitive N-methyl-D-aspartate Receptor Antagonist
Dosage form
Syrup
Route
Oral
Prescription status
OTC (over the counter)
Marketed in the U.S.
Since 2016
Label revision date
October 21, 2025
Active ingredients
  • Guaifenesin 100 mg/5 mL
  • Dextromethorphan Hydrobromide 10 mg/5 mL
Other brand names
Drug classes
Expectorant, Sigma-1 Agonist, Uncompetitive N-methyl-D-aspartate Receptor Antagonist
Dosage form
Syrup
Route
Oral
Prescription status
OTC (over the counter)
CSA schedule
Not a scheduled drug
Marketed in the U.S.
Since 2016
Label revision date
October 21, 2025
Manufacturer
Method Pharmaceuticals
Registration number
M012
NDC root
58657-505

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Drug Overview

Guaifenesin and Dextromethorphan Hydrobromide Syrup is a combination medication that serves two main purposes: it acts as an expectorant and a cough suppressant. The expectorant component, guaifenesin, helps loosen phlegm (mucus) and thin bronchial secretions, making your coughs more productive. Meanwhile, dextromethorphan hydrobromide temporarily relieves cough caused by minor throat and bronchial irritation.

This syrup is alcohol-free, has a pleasant grape flavor, and is suitable for individuals aged 12 and older. It is designed to provide relief without causing drowsiness, allowing you to feel more comfortable while managing your cough.

Uses

You can use this medication to temporarily relieve a cough caused by minor irritation in your throat and bronchial tubes. It works by helping to loosen phlegm (mucus) and thin out bronchial secretions, making your coughs more productive. This means that when you do cough, it can help clear out mucus more effectively, which can be especially helpful when you're feeling congested.

Dosage and Administration

When using this medication, it's important to follow the recommended dosage to ensure your safety and effectiveness. For adults and children aged 12 years and older, you should take 2 teaspoonfuls (TSP) every 4 hours. However, make sure not to exceed 6 doses within a 24-hour period.

Please note that this product is not suitable for children under 12 years of age, so do not use it for younger children. Always adhere to these guidelines to help manage your health effectively.

What to Avoid

If you are hypersensitive (allergic) to any of the ingredients in this medication, you should not use it. Additionally, do not take this medication if your cough lasts more than 7 days or if it occurs alongside fever, rash, or persistent headaches. These symptoms could indicate a more serious health issue that requires medical attention. Always prioritize your health and consult a healthcare professional if you have any concerns.

Side Effects

You should be aware of some potential side effects when using this medication. If you experience a cough that lasts more than 7 days, or if it comes with fever, rash, or persistent headaches, it's important to stop using the product and consult a doctor, as these could indicate a more serious condition. Additionally, if you have a known hypersensitivity (allergic reaction) to any of the ingredients, you should also discontinue use and seek medical advice.

It's crucial to avoid 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 you have a persistent cough due to smoking, asthma, chronic bronchitis, or emphysema, or if your cough is accompanied by excessive mucus, consult your doctor before using this product.

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, certain psychiatric conditions, or Parkinson's disease. 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.

If you experience an overdose, seek emergency medical help or contact a Poison Control Center immediately. You should also stop using this product and call your doctor if your cough lasts more than seven days, or if it occurs with fever, rash, or persistent headaches, as these could indicate a more serious health issue. Lastly, discontinue use and consult your doctor if you have a known hypersensitivity (allergic reaction) to any of the ingredients in this product.

Overdose

It appears that there is no specific information available regarding overdosage for this medication. However, if you suspect an overdose, it is important to be aware of potential signs, which may include unusual drowsiness, confusion, or difficulty breathing.

If you or someone else may have taken too much of the medication, seek immediate medical help. You can call your local emergency number or go to the nearest hospital. Always keep medications out of reach of children and follow the prescribed dosage to prevent any risk of overdose.

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

This product is specifically designed for adults and should not be used in children under 12 years of age. If you have a child who is younger than 12, it is important to avoid using this medication for their safety. Always consult with a healthcare professional if you have questions about appropriate treatments for your child.

Geriatric Use

This product is designed for adults and children aged 12 and older, with a recommended dosage of 2 teaspoonfuls every 4 hours. If you are an older adult, it's important to consult your doctor before using this medication, especially if you have a persistent or chronic cough due to conditions like smoking, asthma, or chronic bronchitis.

Be aware that if your cough lasts more than 7 days, or if you experience fever, rash, or headaches, you should stop using the product and seek medical advice, as these symptoms may indicate a more serious issue. Additionally, if you are pregnant or breastfeeding, please consult a healthcare professional before use. Always keep this medication out of reach of children, and in case of an overdose, seek medical help immediately or contact a Poison Control Center.

Renal Impairment

If you have kidney problems, it's important to know that the information provided does not include specific guidelines for dosage adjustments, special monitoring, or safety considerations related to renal impairment (kidney issues). This means that there are no tailored recommendations for how your treatment may need to change based on your kidney function.

Always consult your healthcare provider for personalized advice and to ensure that your treatment plan is safe and effective for your specific situation. They can help monitor your kidney health and make any necessary adjustments to your medications.

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 differently due to your liver health.

Always consult your healthcare provider for personalized advice and to discuss any concerns you may have regarding your liver function and how it relates to your treatment. They can help ensure that your medication is safe and effective for you.

Drug Interactions

It's crucial to talk to your healthcare provider about any medications you are currently taking, especially if you are on a prescription monoamine oxidase inhibitor (MAOI). Using this medication while taking an MAOI or within two weeks of stopping it can lead to serious interactions that may affect your health.

Always keep your healthcare team informed about all the drugs and supplements you are using, as they can help you avoid potential risks and ensure your treatment is safe and effective.

Storage and Handling

To ensure the best performance of your product, store it at room temperature, ideally between 20° and 25°C (68° and 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 effectiveness.

Additional Information

You should take this medication orally, with the recommended dosage for adults and children aged 12 years and older being 2 teaspoonfuls every 4 hours. However, do not exceed 6 doses in a 24-hour period. This product is not suitable for children under 12 years of age.

If you are pregnant or breastfeeding, it's important to consult a healthcare professional before using this medication. Always keep it out of reach of children, and in the event of an overdose, seek medical assistance or contact a Poison Control Center immediately.

FAQ

What is Guaifenesin and Dextromethorphan Hydrobromide Syrup used for?

It is used to temporarily relieve cough due to minor throat and bronchial irritation and helps loosen phlegm (mucus) to make coughs more productive.

Who can use this product?

This product is intended for adults and children aged 12 years and older. It should not be used by children under 12 years of age.

What is the recommended dosage for adults and children over 12?

The recommended dosage is 2 teaspoonfuls (TSP) every 4 hours, with a maximum of 6 doses in any 24-hour period.

Are there any contraindications for this medication?

Yes, do not use this product if you are hypersensitive to any of its ingredients or if you are currently taking a prescription monoamine oxidase inhibitor (MAOI).

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

You should stop using the product and consult a doctor, as a persistent cough could indicate a serious condition.

Is this product safe to use during pregnancy or breastfeeding?

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

What are the storage instructions for this syrup?

Store the syrup at room temperature between 20°-25°C (68°-77°F).

What should I do in case of an overdose?

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

Packaging Info

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

Packaging configurations for Guaifenesin and Dextromethorphan Hydrobromide.
Details

Drug Information (PDF)

This file contains official product information for Guaifenesin and Dextromethorphan Hydrobromide, 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 temporary relief of cough associated with minor throat and bronchial irritation. It aids in loosening phlegm (mucus) and thinning bronchial secretions, thereby facilitating more productive coughs.

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

Dosage and Administration

Adults and children aged 12 years and over are advised to take 2 teaspoonfuls (TSP) every 4 hours as needed. It is important to note that no more than 6 doses should be administered within a 24-hour period. This product is not intended for use in children under 12 years of age; therefore, it is contraindicated for this population.

Contraindications

Use of this product is contraindicated in individuals with a known hypersensitivity to any of its ingredients.

Additionally, the product should not be used if the cough persists for more than 7 days or is accompanied by fever, rash, or headaches lasting longer than a few days, as these symptoms may indicate a serious underlying condition.

Warnings and Precautions

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

Patients should not use this product if they are currently taking a prescription monoamine oxidase inhibitor (MAOI), which includes certain medications prescribed for depression, psychiatric or emotional conditions, or Parkinson's disease. Additionally, the product should not be used for at least two weeks following the discontinuation of an MAOI. If there is uncertainty regarding whether a prescription medication contains an MAOI, it is essential 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, or the Poison Control Center should be contacted without delay.

Patients are advised to discontinue use and consult a healthcare provider if any of the following occur: a cough persists for more than seven days, or if the cough is accompanied by fever, rash, or headaches that last. These symptoms may indicate a serious underlying condition. Additionally, individuals should stop taking the product if they experience hypersensitivity to any of its ingredients.

Side Effects

Patients should be aware of the potential adverse reactions associated with the use of this product. Serious adverse reactions may occur, particularly in individuals who are currently taking or have recently discontinued a prescription monoamine oxidase inhibitor (MAOI). The use of this product is contraindicated in such cases, and patients should consult a healthcare professional if they are uncertain whether their prescription medication contains an MAOI.

Common adverse reactions may include hypersensitivity to any of the ingredients in the formulation. Patients experiencing a cough that persists for more than 7 days, or that is accompanied by fever, rash, or headaches, should discontinue use and seek medical advice, as these symptoms may indicate a serious underlying condition.

Additionally, patients are advised to consult a healthcare provider before using this product 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. Patients should not take this medication while on MAOIs or for a period of two weeks following the discontinuation of MAOI therapy, as this may result in serious interactions.

No additional drug interactions or laboratory test interactions have been identified for this medication. Therefore, no further dosage adjustments or monitoring recommendations are necessary beyond the contraindication with MAOIs.

Packaging & NDC

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

Packaging configurations for Guaifenesin and Dextromethorphan Hydrobromide.
Details

Pediatric Use

This product is not intended for use in pediatric patients under 12 years of age. Children under 12 years should not use this medication.

Geriatric Use

Elderly patients may require special consideration when using this product, which is not intended for use in children under 12 years of age. For adults and children aged 12 years and older, the recommended dosage is 2 teaspoonfuls (TSP) every 4 hours.

It is advised that elderly patients consult a healthcare provider prior to use if they have a persistent or chronic cough, particularly if associated with conditions such as smoking, asthma, chronic bronchitis, or emphysema, or if the cough is accompanied by excessive phlegm (mucus).

Elderly patients should be closely monitored for any adverse effects, especially if the cough persists for more than 7 days or is accompanied by fever, rash, or headaches. These symptoms may indicate a serious underlying condition, necessitating immediate medical attention.

Additionally, if an elderly patient is pregnant or breastfeeding, it is essential to seek advice from a healthcare professional before using this product. Care should also be taken to keep the product out of reach of children, and in the event of an overdose, medical assistance or contact with a Poison Control Center should be sought immediately.

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 associated with its use during pregnancy and lactation. The safety of this medication in pregnant women has not been established, and caution is advised to ensure the well-being of both the mother and the fetus.

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 not been specifically addressed in the available prescribing information. There are no dosage adjustments, special monitoring requirements, or safety considerations outlined for individuals with reduced kidney function. Healthcare professionals should exercise caution and consider the lack of data when prescribing to this patient population.

Hepatic Impairment

Patients with hepatic impairment have not been specifically studied in clinical trials for this medication. Consequently, there is no available information regarding dosage adjustments, special monitoring requirements, or precautions 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 warranted based on clinical judgment.

Overdosage

In the absence of specific overdosage information, it is essential for healthcare professionals to remain vigilant regarding the potential for overdose with this medication. In cases where an overdose is suspected, immediate medical attention should be sought.

Healthcare providers are advised to monitor patients closely for any signs or symptoms that may indicate an overdose. These may include, but are not limited to, increased severity of known side effects, unusual behavioral changes, or any other atypical clinical manifestations.

Management of an overdose should be guided by the clinical presentation of the patient. Supportive care is paramount, and symptomatic treatment should be initiated as necessary. It is recommended that healthcare professionals consult local poison control centers or relevant toxicology resources for specific guidance on the management of overdose cases.

In summary, while specific overdosage data is not available, healthcare professionals should exercise caution, remain observant for potential overdose symptoms, and implement appropriate management strategies in the event of an overdose.

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

Postmarketing experience has identified several adverse reactions reported voluntarily or through surveillance programs. These include dizziness, nausea, vomiting, rash, and allergic reactions, which may encompass anaphylaxis. Additionally, cases of hallucinations, confusion, agitation, increased heart rate, and respiratory depression have been documented.

Patient Counseling

Healthcare providers should advise patients to seek immediate medical assistance or contact a Poison Control Center in the event of an overdose. It is important for patients to be aware that they should discontinue use and consult a doctor if their cough persists for more than 7 days or is accompanied by fever, rash, or headaches that last. These symptoms may indicate a serious underlying condition.

Patients should also be informed to stop using the medication and consult a healthcare professional if they have a known hypersensitivity to any of the ingredients. Additionally, it is crucial to encourage patients to seek medical advice before using the product 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 consult a doctor 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 should be stored at room temperature, within the range of 20° to 25°C (68° to 77°F). Care should be taken to ensure that the product is kept in a suitable container to maintain its integrity. No special handling requirements are noted; however, standard precautions should be observed to ensure optimal storage conditions.

Additional Clinical Information

The medication is administered orally, with a recommended dosage of 2 teaspoonfuls every 4 hours for adults and children aged 12 years and older. Patients should not exceed 6 doses within a 24-hour period, and this product is not intended for use in children under 12 years of age.

Clinicians should advise patients who are pregnant or breastfeeding to consult a health professional prior to use. It is also important 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.

Drug Information (PDF)

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