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Guaifenesin

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Active ingredient
Guaifenesin 200 mg
Other brand names
Drug class
Expectorant
Dosage form
Tablet
Route
Oral
Prescription status
OTC (over the counter)
Marketed in the U.S.
Since 2009
Label revision date
June 2, 2025
Active ingredient
Guaifenesin 200 mg
Other brand names
Drug class
Expectorant
Dosage form
Tablet
Route
Oral
Prescription status
OTC (over the counter)
CSA schedule
Not a scheduled drug
Marketed in the U.S.
Since 2009
Label revision date
June 2, 2025
Manufacturer
Major Pharmaceuticals
Registration number
M012
NDC root
0904-5154

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Drug Overview

Guaifenesin is an expectorant, which means it helps to relieve chest congestion by loosening phlegm (mucus) and thinning bronchial secretions. This action aids in clearing the bronchial passageways of bothersome mucus, making coughs more productive. It is commonly used to help you feel more comfortable when dealing with respiratory issues related to congestion.

This medication comes in an immediate release formulation, containing 200 mg of guaifenesin per tablet, and is designed to help you breathe easier by reducing mucus buildup in your airways.

Uses

This medication is designed to help you breathe easier by loosening phlegm (mucus) and thinning bronchial secretions. By doing so, it makes it easier for you to clear out bothersome mucus from your airways, which can lead to more productive coughs.

In addition to helping with mucus, this medication also provides relief from chest congestion, allowing you to feel more comfortable and breathe more freely. If you're dealing with thick mucus or congestion, this treatment can be a helpful option to consider.

Dosage and Administration

When taking this medication, adults and children aged 12 years and older should take 1 to 2 tablets every 4 hours. If you are giving this medication to a child between the ages of 6 and under 12 years, the dosage is ½ to 1 tablet every 4 hours. For children under 6 years, it’s important to consult a doctor before administering any dosage.

Make sure not to exceed 6 doses in a 24-hour period, as this is the maximum recommended amount. To take the tablets, swallow them with a full glass of water to help with absorption and effectiveness. Always follow these guidelines to ensure safe and effective use of the medication.

What to Avoid

It's important to be aware of certain guidelines when using this medication. You should stop using it and consult your doctor if your cough lasts more than 7 days, comes back frequently, or is accompanied by symptoms like fever, rash, or a persistent headache. These could indicate a more serious health issue that needs attention.

Currently, there are no specific contraindications, controlled substance classifications, or concerns regarding abuse, misuse, or dependence associated with this medication. However, always prioritize your health and seek medical advice if you have any questions or concerns.

Side Effects

If you experience a cough that lasts more than 7 days, keeps coming back, or is accompanied by a fever, rash, or a persistent headache, it's important to stop using the medication and consult a doctor, as these could indicate a more serious health issue.

Before using this medication, you should also talk to your doctor if your cough comes with excessive mucus or if you have a chronic cough due to conditions like smoking, asthma, chronic bronchitis, or emphysema.

Warnings and Precautions

Before using this medication, it's important to consult your doctor if you have a cough that produces a lot of phlegm (mucus) or if you have a persistent cough due to smoking, asthma, chronic bronchitis, or emphysema.

You should stop using the medication and contact your doctor if your cough lasts more than 7 days, comes back frequently, or is accompanied by a fever, rash, or a persistent headache, as these may indicate a more serious health issue. In case of an overdose, seek emergency medical help or contact a Poison Control Center immediately.

If you are pregnant or breastfeeding, please consult a healthcare professional before using this medication. Always keep it out of reach of children to ensure their safety.

Overdose

If you suspect an overdose, it’s crucial to seek medical help immediately or contact a Poison Control Center. Signs of an overdose can vary, but they may include unusual symptoms that are more severe than typical side effects.

Always err on the side of caution—if you notice anything concerning, don’t hesitate to reach out for assistance. Quick action can make a significant difference in ensuring your safety and well-being.

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

When it comes to giving this medication to children, it's important to follow the recommended dosages based on their age. For children aged 12 years and older, you can give them 1 to 2 tablets every 4 hours. If your child is between 6 and under 12 years old, the dosage is ½ to 1 tablet every 4 hours.

For children under 6 years, it's crucial to consult with a doctor before administering the medication. This ensures their safety and helps you get the best advice tailored to your child's needs. Always keep these guidelines in mind to help manage your child's health effectively.

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, it’s important to consult with a healthcare provider before starting the medication. 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 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 your kidneys are not functioning properly.

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 should be used if you have hepatic impairment (liver issues).

Before starting any new medication, including this one, you should 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. In this case, there are no known drug interactions or interactions with laboratory tests for the medication in question. However, always ensure that your healthcare provider is aware of all the medications you are using, as well as any tests you may undergo, to ensure your safety and the effectiveness of your treatment. This way, you can avoid any potential issues and receive the best care possible.

Storage and Handling

To ensure the best performance of your product, store it at room temperature, specifically at 25ºC (77ºF). It's acceptable for the temperature to vary between 15ºC and 30ºC (59ºF to 86ºF) occasionally. Always check the expiration date on the package and use the product before this date to guarantee its safety and effectiveness.

When handling the product, make sure to do so with clean hands and in a safe environment to maintain its integrity. Proper storage and careful handling are key to ensuring that you get the most out of your product.

Additional Information

You can take this medication orally. For adults and children aged 12 years and older, the recommended dose is 1 to 2 tablets every 4 hours. If your child is between 6 and under 12 years old, they should take ½ to 1 tablet every 4 hours. For children under 6 years, it's best to consult a doctor before giving them this medication.

FAQ

What is Guaifenesin?

Guaifenesin is an expectorant that helps loosen phlegm (mucus) and thin bronchial secretions.

What are the uses of Guaifenesin?

It relieves chest congestion, thins and loosens mucus, and makes coughs more productive.

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

The recommended dosage is 1 to 2 tablets every 4 hours.

What is the dosage for children aged 6 to under 12?

Children aged 6 to under 12 should take ½ to 1 tablet every 4 hours.

What should I do if my cough persists?

Stop use and ask a doctor if your cough persists for more than 7 days, tends to recur, or is accompanied by a fever, rash, or persistent headache.

Are there any contraindications for Guaifenesin?

No specific contraindications are mentioned in the provided information.

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 Guaifenesin if I am pregnant or breastfeeding?

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

How should Guaifenesin be stored?

Store Guaifenesin at 25ºC (77ºF), with excursions permitted between 15º-30ºC (59º-86ºF).

What is the maximum dosage of Guaifenesin?

Do not exceed 6 doses in 24 hours.

Packaging Info

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

Packaging configurations for Guaifenesin.
Details

Drug Information (PDF)

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

View product document (PDF)

Description

Guaifenesin is an expectorant available in tablet form, with a strength of 200 mg per tablet. It is indicated for the relief of chest congestion and works by thinning and loosening mucus. Each package contains 100 tablets. The product features a tamper-evident seal; it should not be used if the imprinted safety seal under the cap is broken or missing. Guaifenesin is distributed by MAJOR® PHARMACEUTICALS, located in Indianapolis, IN 46268, and can be contacted at (800) 616-2471. Additional information is available on the website www.major-rugby.com. The revision date for this information is April 25, M-17, with a reorder number of 238163.

Uses and Indications

This drug is indicated for the relief of chest congestion and to assist in the loosening of phlegm (mucus) and thinning of bronchial secretions. By facilitating the clearance of bothersome mucus, this medication enhances the productivity of coughs, thereby aiding in the management of respiratory conditions characterized by excessive mucus production.

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

Dosage and Administration

For adults and children aged 12 years and over, the recommended dosage is 1 to 2 tablets every 4 hours as needed. For children aged 6 to under 12 years, the dosage is ½ to 1 tablet every 4 hours. For children under 6 years of age, it is advised to consult a physician for appropriate dosing.

It is important to note that the maximum dosage should not exceed 6 doses within a 24-hour period. The tablets should be taken with a full glass of water to ensure proper administration and absorption.

Contraindications

Use is contraindicated in patients who experience a cough that persists for more than 7 days, tends to recur, or is accompanied by fever, rash, or persistent headache. These symptoms may indicate a serious underlying condition that requires medical evaluation.

Warnings and Precautions

It is essential for healthcare professionals to be aware of the following warnings and precautions associated with the use of this medication.

Patients should be advised to consult a physician prior to use if they present with a cough that is accompanied by excessive phlegm (mucus) or if they have a persistent or chronic cough, which may be indicative of underlying conditions such as smoking, asthma, chronic bronchitis, or emphysema.

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

In the event of an overdose, it is critical to obtain emergency medical assistance immediately or contact a Poison Control Center for guidance.

General precautions should be taken into account; specifically, individuals who are pregnant or breastfeeding should consult a healthcare professional before using this medication to ensure safety for both the mother and child.

Lastly, it is imperative to keep this medication out of reach of children to prevent accidental ingestion or misuse.

Side Effects

Patients should be aware of the potential adverse reactions associated with the use of this medication. Serious adverse reactions may necessitate immediate medical attention. Patients are advised to stop use and consult a healthcare professional if a cough persists for more than 7 days, tends to recur, or is accompanied by symptoms such as fever, rash, or persistent headache, as these may indicate a serious underlying condition.

Additionally, patients should seek medical advice before using this medication if they have a cough that is accompanied by excessive phlegm (mucus) or if they experience a persistent or chronic cough, which may occur in conditions such as smoking, asthma, chronic bronchitis, or emphysema. These considerations are important to ensure the safe and effective use of the medication.

Drug Interactions

There are no documented drug interactions associated with the use of this medication. Additionally, there are no reported interactions between this drug and laboratory tests. Therefore, no dosage adjustments or monitoring recommendations are necessary based on drug interactions.

Packaging & NDC

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

Packaging configurations for Guaifenesin.
Details

Pediatric Use

Pediatric patients aged 12 years and over may be administered 1 to 2 tablets every 4 hours as needed. For children aged 6 to under 12 years, the recommended dosage is ½ to 1 tablet every 4 hours. It is advised that parents or caregivers consult a doctor before using this medication in children under 6 years of age.

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. It is important to assess the potential risks and benefits, as well as any available data regarding fetal outcomes and lactation. Healthcare providers should consider individual circumstances and the specific health needs of the patient when making recommendations.

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 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 drug insert regarding dosage adjustments, special monitoring, or safety considerations. Therefore, healthcare professionals should exercise caution when prescribing this medication 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 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 or contact a Poison Control Center without delay. Prompt intervention is crucial to mitigate potential adverse effects associated with the overdose.

Healthcare professionals should be vigilant for symptoms that may arise from an overdose, although specific symptoms are not detailed in the provided information. The management of an overdose typically involves supportive care and symptomatic treatment, tailored to the individual patient's needs.

It is essential for healthcare providers to remain alert to the signs of overdose and to act swiftly in accordance with established medical protocols.

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 compound in these areas.

Postmarketing Experience

No postmarketing experience details are provided in the insert for SPL code 90375-7.

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 of the signs that warrant discontinuation of the medication; they should stop use and consult a doctor if their cough persists for more than 7 days, tends to recur, or is accompanied by symptoms such as fever, rash, or a persistent headache, as these may indicate a serious underlying condition.

Additionally, healthcare providers should encourage patients to consult with a doctor prior to using the medication if they are experiencing a cough that is accompanied by excessive phlegm (mucus) or if they have a persistent or chronic cough related to smoking, asthma, chronic bronchitis, or emphysema. This precaution is essential to ensure the safe and effective use of the medication.

Storage and Handling

The product is supplied in packaging that includes specific NDC numbers. It should be stored at a controlled room temperature of 25ºC (77ºF), with permissible excursions between 15ºC and 30ºC (59ºF to 86ºF). It is essential to adhere to the expiration date indicated on the package to ensure product efficacy and safety.

Additional Clinical Information

The medication is administered orally, with specific dosing guidelines based on age. For adults and children aged 12 years and older, the recommended dosage is 1 to 2 tablets every 4 hours. For children aged 6 to under 12 years, the dosage is ½ to 1 tablet every 4 hours. For children under 6 years, it is advised to consult a doctor for appropriate dosing.

No additional information is available regarding laboratory tests, abuse potential, patient counseling, or postmarketing experience.

Drug Information (PDF)

This file contains official product information for Guaifenesin, 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, 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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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.