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Zyncof

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Active ingredients
  • Guaifenesin 400 mg/5 mL
  • Dextromethorphan Hydrobromide 20 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 2011
Label revision date
November 13, 2025
Active ingredients
  • Guaifenesin 400 mg/5 mL
  • Dextromethorphan Hydrobromide 20 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 2011
Label revision date
November 13, 2025
Manufacturer
Kramer Novis
Registration number
M012
NDC root
52083-400

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

Drug Overview

ZYNCOF is a medication designed to temporarily relieve cough caused by minor irritation in the throat and bronchial tubes, which can happen during a cold. It works by helping to loosen phlegm (mucus) and thin bronchial secretions, making it easier for you to drain your bronchial tubes.

If you're experiencing a cough due to these minor irritations, ZYNCOF can provide relief by addressing the underlying symptoms and helping you feel more comfortable.

Uses

If you're dealing with a cough caused by minor irritation in your throat or bronchial tubes, especially during a cold, this medication can provide temporary relief. It works by soothing your throat and helping to ease that persistent cough.

Additionally, this medication helps to loosen phlegm (mucus) and thin out bronchial secretions, making it easier for your body to drain the bronchial tubes. This can be particularly helpful when you're feeling congested and need to clear your airways.

Dosage and Administration

When taking 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 1 teaspoon (which is 5 mL) every 4 hours. However, make sure not to exceed 6 doses within a 24-hour period.

If your child is under 12 years old, you should not use this medication for them. Always remember to take the medication orally, measuring out the correct amount with a teaspoon. Following these guidelines will help you use the medication safely and effectively.

What to Avoid

It's important to keep this medication out of reach of children to ensure their safety. If you suspect an overdose, seek medical help immediately or contact a Poison Control Center for assistance.

While there are no specific contraindications, controlled substance classifications, or noted risks of abuse, misuse, or dependence associated with this medication, always use it responsibly and as directed. Your health and safety are paramount, so please follow these guidelines closely.

Side Effects

You should be aware of some important warnings and potential side effects when using this medication. It is not safe to use if you are currently taking a prescription monoamine oxidase inhibitor (MAOI), which is a type of medication used for depression or certain other conditions, or if you have stopped taking an MAOI within the last two weeks. Before using this medication, consult your doctor if you have a cough that produces a lot of mucus, or if you have a chronic cough due to smoking, asthma, chronic bronchitis, or emphysema.

If your cough lasts more than seven days, returns, or is accompanied by symptoms like fever, rash, or a persistent headache, you should stop using the medication and seek medical advice, as these could indicate a more serious health issue. Additionally, if you are pregnant or breastfeeding, it’s important to talk to a healthcare professional before using this medication.

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 for depression or certain other conditions, or if you have stopped taking an MAOI within the last two weeks. If you're unsure whether your medication contains an MAOI, please consult your doctor or pharmacist. Additionally, consult a doctor before using this product if you have a cough with excessive mucus or a chronic cough due to smoking, asthma, chronic bronchitis, or emphysema.

It's important to follow the dosage instructions carefully and not exceed the recommended amount. If your cough lasts more than 7 days, returns, or is accompanied by fever, rash, or a persistent headache, stop using the product and contact your doctor, as these may indicate a more serious issue. Keep this medication out of reach of children, and in case of an overdose, seek medical help or contact a Poison Control Center immediately. If you are pregnant or breastfeeding, please consult a healthcare professional before use.

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.

Don’t wait for symptoms to worsen; acting quickly can make a significant difference in your safety. Always prioritize your health and well-being by reaching out for professional assistance in these situations.

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

If you are considering this medication for your child, it's important to know that it should not be used in children under 12 years of age. For those who are 12 years and older, the recommended dosage is 1 teaspoon (5 mL) every 4 hours, but be sure not to exceed 6 doses in a 24-hour period. Always follow these guidelines to ensure your child's safety and well-being.

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 for personalized advice. 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 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 condition. 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 information provided does not include specific guidelines for dosage adjustments, special monitoring, or precautions related to your condition. This means that there are no tailored recommendations for how the medication may affect you differently due to your liver health.

Always consult your healthcare provider for personalized advice and to ensure that any treatment plan is safe and effective for your specific situation. They can help determine the best approach based on your liver function and overall health.

Drug Interactions

It's important to be cautious when taking ZYNCOF, especially if you are currently using or have recently stopped a prescription monoamine oxidase inhibitor (MAOI), which is a type of medication often used to treat depression. Using ZYNCOF while on an MAOI or within two weeks of stopping it can lead to serious interactions that may affect your health.

Always discuss any medications you are taking, including ZYNCOF, with your healthcare provider. They can help ensure that your treatment plan is safe and effective, taking into account all the medications and supplements you may be using. Your safety is the top priority, so don't hesitate to ask questions or express any concerns.

Storage and Handling

To ensure the best performance and safety of your product, store it at a controlled room temperature between 15-30°C (59-86°F). It's important to keep it away from excessive heat and humidity, as these conditions can affect its quality.

Before using the product, check the printed security seal. If it is torn, broken, or missing, do not use the product, as this may indicate that it is no longer safe. Following these guidelines will help you handle the product safely and effectively.

Additional Information

No further information is available.

FAQ

What is ZYNCOF used for?

ZYNCOF is used to temporarily relieve cough due to minor throat and bronchial irritation, such as that which may occur with a cold. It also helps loosen phlegm (mucus) and thin bronchial secretions.

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

For adults and children 12 years of age and over, the recommended dosage is 1 teaspoon (5 mL) every 4 hours, with a maximum of 6 doses in any 24-hour period.

Can children under 12 use ZYNCOF?

No, ZYNCOF should not be used in children under 12 years of age.

What should I do in case of an overdose?

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

Are there any warnings associated with ZYNCOF?

Yes, do not use ZYNCOF if you are currently taking a prescription monoamine oxidase inhibitor (MAOI) or for 2 weeks after stopping an MAOI. Consult a doctor if you have a cough with too much phlegm or if your cough lasts more than 7 days.

What precautions should I take if I am pregnant or breastfeeding?

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

How should ZYNCOF be stored?

Store ZYNCOF at a controlled room temperature of 15-30°C (59-86°F) and avoid excessive heat or humidity. Do not use if the printed security seal is torn, broken, or missing.

Packaging Info

Below are the non-prescription pack sizes of Zyncof (dextromethorphan hbr and guaifenesin). Columns show Packaging, Formulation Type, and Active Ingredient Strength.

Packaging configurations for Zyncof.
Details

Drug Information (PDF)

This file contains official product information for Zyncof, 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, which may occur due to a cold. Additionally, it aids in loosening phlegm (mucus) and thinning bronchial secretions, facilitating drainage from the bronchial tubes.

Limitations of Use: This medication is intended for symptomatic relief and does not address the underlying causes of cough or respiratory conditions.

Dosage and Administration

The recommended dosage for adults and children aged 12 years and older is 1 teaspoon (5 mL) administered orally every 4 hours. It is important to note that no more than 6 doses should be taken within a 24-hour period. For children under 12 years of age, the use of this medication is not recommended.

Contraindications

Use is contraindicated in children due to the risk of accidental ingestion. In the event of an overdose, immediate medical assistance should be sought or contact with a Poison Control Center is advised.

Warnings and Precautions

The use of this product is contraindicated in individuals currently taking a prescription monoamine oxidase inhibitor (MAOI), which includes certain medications prescribed for depression, psychiatric or emotional conditions, or Parkinson’s disease. It is also advised to refrain from using this product for at least two weeks following the discontinuation of an MAOI. Healthcare professionals should be consulted if there is uncertainty regarding the presence of an MAOI in a prescription medication.

Healthcare providers should be consulted prior to use if the patient has a cough that is productive with excessive phlegm or if the cough is chronic, as seen in conditions such as smoking, asthma, chronic bronchitis, or emphysema.

It is imperative that patients adhere strictly to the recommended dosage and not exceed the directed amount while using this product. Should the cough persist for more than seven days, recur, or be accompanied by symptoms such as fever, rash, or a persistent headache, patients are advised to discontinue use and seek medical advice, as these symptoms may indicate a serious underlying condition.

For pregnant or breastfeeding individuals, it is essential to consult a healthcare professional before using this product to ensure safety for both the mother and child.

General precautions include keeping this product out of reach of children. In the event of an overdose, immediate medical assistance should be sought, or contact with a Poison Control Center is recommended.

In summary, patients should stop using the product and consult a healthcare provider if the cough lasts beyond seven days, returns, or is associated with fever, rash, or persistent headache.

Side Effects

Patients should be aware of several important warnings associated with the use of this medication. It is contraindicated in individuals currently taking a prescription monoamine oxidase inhibitor (MAOI), which includes certain drugs used for depression, psychiatric or emotional conditions, or Parkinson’s disease. Additionally, the medication should not be used for at least 2 weeks after discontinuing an MAOI.

Before using this medication, patients should consult a healthcare professional if they have a cough that occurs with excessive phlegm (mucus) or if they have a chronic cough, such as that associated with smoking, asthma, chronic bronchitis, or emphysema.

Patients are advised to discontinue use and seek medical advice if their cough persists for more than 7 days, returns, or is accompanied by fever, rash, or a persistent headache, as these symptoms may indicate a serious underlying condition. Furthermore, pregnant or breastfeeding individuals should consult a healthcare professional prior to use to ensure safety for both the mother and child.

Drug Interactions

The concomitant use of ZYNCOF with prescription monoamine oxidase inhibitors (MAOIs) is contraindicated. Patients should not use ZYNCOF while taking an MAOI or for a period of two weeks following the discontinuation of an MAOI. This combination may result in serious interactions that could pose significant health risks. It is essential for healthcare providers to monitor patients closely and consider alternative treatments during this period to avoid potential adverse effects.

Packaging & NDC

Below are the non-prescription pack sizes of Zyncof (dextromethorphan hbr and guaifenesin). Columns show Packaging, Formulation Type, and Active Ingredient Strength.

Packaging configurations for Zyncof.
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 teaspoon (5 mL) every 4 hours, with a maximum of 6 doses in any 24-hour period. Caution is advised to ensure adherence to the dosing guidelines to avoid potential overdose.

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 associated with its use during pregnancy and lactation. The safety of this medication in pregnant women has not been established, and therefore, caution is advised.

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 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 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 aware that the specific symptoms of an overdose may vary depending on the substance involved. Therefore, a thorough assessment of the patient's condition is essential to determine the appropriate course of action.

Management of an overdose typically involves supportive care and symptomatic treatment. Continuous monitoring of the patient's vital signs and clinical status is recommended. In cases where the specific substance is known, targeted therapies may be employed as indicated.

It is essential for healthcare providers to remain vigilant and act swiftly in the management of overdose situations to ensure optimal patient outcomes.

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

Serious side effects have been reported voluntarily through various channels, including surveillance programs. Healthcare professionals and patients are encouraged to report any serious adverse events to the designated phone number available on weekdays from 8 AM to 4 PM AST. This reporting contributes to the ongoing monitoring of the product's safety profile.

Patient Counseling

Healthcare providers should advise patients to keep this medication out of reach of children to prevent accidental ingestion. It is crucial for patients to understand the importance of safeguarding their medication to ensure the safety of young children.

In the event of an overdose, healthcare providers should instruct patients to seek medical help immediately or contact a Poison Control Center. Emphasizing the urgency of this action can help mitigate potential risks associated with overdose and ensure prompt medical intervention if necessary.

Storage and Handling

The product is supplied in configurations that include specific NDC numbers. It should be stored at a controlled room temperature between 15-30°C (59-86°F). Care should be taken to avoid exposure to excessive heat or humidity, as these conditions may compromise the integrity of the product. Additionally, the product must not be used if the printed security seal is torn, broken, or missing, ensuring that the product remains secure and safe for use.

Additional Clinical Information

No further data are available.

Drug Information (PDF)

This file contains official product information for Zyncof, 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 Zyncof, 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.