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Presgen

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Active ingredients
  • Guaifenesin 200 mg/5 mL
  • Dextromethorphan Hydrobromide 10 mg/5 mL
  • Phenylephrine Hydrochloride 5 mg/5 mL
Other brand names
Drug classes
Expectorant, Sigma-1 Agonist, Uncompetitive N-methyl-D-aspartate Receptor Antagonist, alpha-1 Adrenergic Agonist
Dosage form
Syrup
Route
Oral
Prescription status
OTC (over the counter)
Marketed in the U.S.
Since 2011
Label revision date
November 12, 2025
Active ingredients
  • Guaifenesin 200 mg/5 mL
  • Dextromethorphan Hydrobromide 10 mg/5 mL
  • Phenylephrine Hydrochloride 5 mg/5 mL
Other brand names
Drug classes
Expectorant, Sigma-1 Agonist, Uncompetitive N-methyl-D-aspartate Receptor Antagonist, alpha-1 Adrenergic Agonist
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 12, 2025
Manufacturer
Kramer Novis
Registration number
M012
NDC root
52083-632

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Drug Overview

Presgen is a medication designed to help you breathe easier by loosening phlegm (mucus) and thinning bronchial secretions, which allows for better drainage of the bronchial tubes. It is commonly used to temporarily relieve symptoms associated with a cold, such as nasal congestion and cough caused by minor irritation in the throat and bronchial area.

By addressing these symptoms, Presgen can help you feel more comfortable when dealing with a cold, making it easier to manage your daily activities.

Uses

This medication is designed to help you breathe easier by loosening phlegm (mucus) and thinning bronchial secretions, which allows for better drainage of your bronchial tubes. If you're dealing with a cold, it can temporarily relieve symptoms such as nasal congestion and a cough caused by minor irritation in your throat and bronchial area.

It's important to note that this medication has not been associated with teratogenic effects (which means it does not cause birth defects) or any other nonteratogenic effects. This makes it a safer option for those concerned about these issues.

Dosage and Administration

When using this medication, it's important to follow the correct dosage to ensure safety and effectiveness. For adults and children aged 12 years and older, you should take 2 teaspoons (10 mL) every 4 hours as needed. If you're giving this medication to children between the ages of 6 and 12, the appropriate dose is 1 teaspoon (5 mL) every 4 hours.

Please remember not to exceed 6 doses within a 24-hour period. For children under 6 years of age, this medication is not recommended, so you should avoid using it for that age group. Always take the medication orally, and only as needed every 4 hours.

What to Avoid

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

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 safety is a priority, so please follow these guidelines carefully.

Side Effects

You should be aware of some important side effects and warnings associated with this medication. Avoid using it if you are currently taking a 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. Before using this product, consult your doctor if you have heart disease, high blood pressure, thyroid disease, diabetes, difficulty urinating due to an enlarged prostate, or a chronic cough.

While using this medication, do not exceed the recommended dosage. If you experience nervousness, dizziness, or sleeplessness, or if your symptoms do not improve within seven days, seek medical advice. Additionally, if your cough lasts more than seven days, returns, or is accompanied by fever, rash, or a persistent headache, these could indicate a more serious issue, and you should contact a healthcare professional. If you are pregnant or breastfeeding, it's important to consult a health professional before use. In case of an accidental overdose, seek medical help immediately.

Warnings and Precautions

You should avoid using this product 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. If you're unsure whether your medication contains an MAOI, please consult your doctor or pharmacist before using this product. Additionally, it's important to talk to your doctor before using this product if you have any of the following conditions: heart disease, high blood pressure, thyroid disease, diabetes, difficulty urinating due to an enlarged prostate, or a cough that produces a lot of mucus or lasts a long time.

While using this product, make sure not to exceed the recommended dosage. You should stop using it and contact your doctor if you experience nervousness, dizziness, or sleeplessness, if your symptoms do not improve within 7 days, or if your cough lasts more than 7 days, returns, or is accompanied by fever, rash, or a persistent headache, as these may indicate a more serious issue. In the event of an accidental overdose, seek emergency medical help or contact a Poison Control Center immediately.

Overdose

If you suspect an accidental 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 not typical for you.

Don’t wait for symptoms to worsen; getting prompt assistance can be vital. Always prioritize your health and safety by reaching out for help as soon as you think an overdose may have occurred.

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 specific guidelines. For children aged 6 to under 12 years, you can administer 1 teaspoon (5 mL) every 4 hours. However, if your child is under 6 years old, you should not use this medication at all, as it is not recommended for that age group.

For older children and adults, those 12 years and older can take 2 teaspoons (10 mL) every 4 hours. Always ensure you are measuring the dosage accurately to keep your child safe. If you have any concerns or questions about using this medication, consult your healthcare provider.

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.

Always consult your healthcare provider for personalized advice and to ensure that any medications you take are safe and appropriate for your kidney health. They can help you understand how your condition may affect your treatment and what steps to take for your safety.

Hepatic Impairment

If you have liver problems, it's important to know that the drug insert does not provide specific information about dosage adjustments, special monitoring, or precautions for your condition. This means that there are no tailored guidelines for how this medication may affect you if you have hepatic impairment (liver issues).

Always consult your healthcare provider for personalized advice and to ensure that any medication you take is safe and appropriate for your liver health. They can help monitor your condition and make any necessary adjustments to your treatment plan.

Drug Interactions

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

Always keep your healthcare provider informed about all the medications and supplements you are using to ensure your safety and the effectiveness of your treatment. This open communication helps prevent any potential complications and allows for better management of your overall health.

Storage and Handling

To ensure the safety and effectiveness of your product, always check that the security seal is intact before use; do not use it if the seal is torn, broken, or missing. For proper storage, keep the product at a controlled room temperature between 15-30°C (59-86°F) and protect it from excessive heat or humidity, as these conditions can affect its quality.

When handling the product, make sure to do so in a clean environment to maintain its integrity. Following these guidelines will help you use the product safely and effectively.

Additional Information

You should take this medication orally. If you are pregnant or breastfeeding, it's important to consult a healthcare professional before using it. Always keep this medication out of reach of children. In the event of an accidental overdose, seek medical help or contact a Poison Control Center immediately.

FAQ

What is Presgen used for?

Presgen helps loosen phlegm (mucus) and thin bronchial secretions to drain bronchial tubes. It temporarily relieves symptoms of a cold, including nasal congestion and cough due to minor throat and bronchial irritation.

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

Adults and children 12 years of age and over should take 2 teaspoons (10 mL) every 4 hours, not exceeding 6 doses in any 24-hour period.

Can children under 6 years use Presgen?

No, Presgen should not be used in children under 6 years of age.

What should I do in case of accidental overdose?

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

Are there any warnings for using Presgen?

Do not use Presgen if you are taking a prescription monoamine oxidase inhibitor (MAOI) or for 2 weeks after stopping an MAOI. Consult a doctor if you have certain health conditions like heart disease or diabetes.

What should I do if my symptoms do not improve?

Stop using Presgen and ask a doctor if your symptoms do not improve within 7 days or if they are accompanied by fever.

Is it safe to use Presgen during pregnancy or breastfeeding?

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

How should I store Presgen?

Store Presgen at a controlled room temperature of 15-30°C (59-86°F) and avoid excessive heat or humidity.

Packaging Info

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

Packaging configurations for Presgen.
Details

Drug Information (PDF)

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

View product document (PDF)

Description

No description information is available for the specified drug.

Uses and Indications

This drug is indicated for the relief of symptoms associated with colds, including nasal congestion and cough due to minor throat and bronchial irritation. It helps to loosen phlegm (mucus) and thin bronchial secretions, facilitating drainage of the bronchial tubes.

Limitations of Use: There are no known teratogenic or nonteratogenic effects associated with this drug.

Dosage and Administration

Adults and children aged 12 years and over are advised to take 2 teaspoons (10 mL) orally every 4 hours as needed, with a maximum of 6 doses within a 24-hour period. For children aged 6 to under 12 years, the recommended dosage is 1 teaspoon (5 mL) orally every 4 hours, also not to exceed 6 doses in a 24-hour period. The use of this medication is not recommended for children under 6 years of age.

Administration should be performed orally, and dosing should be spaced at 4-hour intervals as required.

Contraindications

Use of this product is contraindicated in the following situations:

  • The product should be kept out of reach of children to prevent accidental ingestion.

  • In the event of an accidental 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 prescription monoamine oxidase inhibitors (MAOIs), which are 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 counsel patients to verify with a doctor or pharmacist if they are uncertain whether their prescription includes an MAOI.

Prior to initiating treatment with this product, patients should consult a healthcare provider if they have any of the following conditions: heart disease, high blood pressure, thyroid disease, diabetes, difficulty urinating due to an enlarged prostate gland, or a cough that is productive with excessive phlegm. Additionally, patients with a chronic cough associated with smoking, asthma, chronic bronchitis, or emphysema should seek medical advice before use.

It is imperative that patients adhere to the recommended dosage and avoid exceeding it during treatment.

Patients should discontinue use and consult a healthcare professional if they experience symptoms such as nervousness, dizziness, or insomnia. Furthermore, if symptoms do not improve within seven days or are accompanied by fever, or if a cough persists for more than seven days, recurs, or is associated with fever, rash, or a persistent headache, medical evaluation is warranted as these may indicate a serious underlying condition.

In the event of an accidental overdose, immediate medical assistance should be sought, or the local Poison Control Center should be contacted without delay.

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 with specific pre-existing conditions. It is contraindicated for patients currently taking a prescription monoamine oxidase inhibitor (MAOI) or for those who have discontinued MAOI therapy within the past two weeks.

Patients with heart disease, high blood pressure, thyroid disease, diabetes, or those experiencing urinary difficulties due to an enlarged prostate gland should consult a healthcare professional before using this product. Additionally, individuals with a cough that produces excessive phlegm or chronic coughs related to smoking, asthma, chronic bronchitis, or emphysema should seek medical advice prior to use.

Common adverse reactions may include nervousness, dizziness, and sleeplessness. Patients are advised to discontinue use and consult a healthcare provider if these symptoms occur. Furthermore, if symptoms do not improve within seven days, or if they are accompanied by fever, or if a cough persists for more than seven days, recurs, or is associated with fever, rash, or a persistent headache, medical attention should be sought as these may indicate a serious condition.

In the event of an accidental overdose, it is crucial to seek immediate medical assistance or contact a Poison Control Center. Pregnant or breastfeeding individuals should also consult a healthcare professional before using this product to ensure safety for both the mother and child.

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, routine monitoring or dosage adjustments are not necessary beyond the contraindication with MAOIs.

Packaging & NDC

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

Packaging configurations for Presgen.
Details

Pediatric Use

Pediatric patients aged 6 to under 12 years may be administered 1 teaspoon (5 mL) every 4 hours. For children under 6 years of age, the use of this medication is not recommended. In contrast, adults and children aged 12 years and older can take 2 teaspoons (10 mL) every 4 hours. Care should be taken to adhere to these dosing guidelines to ensure safety and efficacy in pediatric populations.

Geriatric Use

There is no specific information 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. It is advisable to monitor these patients closely for any adverse effects or changes in efficacy, given the lack of targeted data for this population.

Pregnancy

Pregnant patients and those who are breastfeeding should consult a healthcare professional prior to using this medication. 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 safe use during pregnancy and lactation.

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 mothers.

Renal Impairment

Patients with renal impairment have not been specifically addressed in the available data 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 lack of information necessitates careful clinical judgment and monitoring.

Hepatic Impairment

Patients with hepatic impairment have not been specifically studied in clinical trials for 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 accidental overdose, it is imperative to seek immediate medical assistance or contact a Poison Control Center without delay. Prompt action is crucial to mitigate potential adverse effects associated with overdosage.

Healthcare professionals should be aware that symptoms of overdose may vary depending on the specific 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 specific antidotes are available, their administration should be considered based on the clinical scenario.

It is vital for healthcare providers to remain vigilant and prepared to implement emergency protocols in the event of an overdose, ensuring the best possible outcomes for affected individuals.

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 revealed reports of adverse reactions, including allergic reactions such as anaphylaxis, angioedema, and urticaria. These events have been reported voluntarily or identified through surveillance programs.

Patient Counseling

Healthcare providers should advise patients to keep the medication out of reach of children to prevent accidental ingestion. It is important for patients to understand the potential risks associated with overdose. In the event of an accidental overdose, patients should be instructed to seek medical help immediately or contact a Poison Control Center for assistance. This information is crucial for ensuring patient safety and promoting responsible use of the medication.

Storage and Handling

The product is supplied in packaging that ensures integrity and security. It is imperative that the product is not used if the security seal is torn, broken, or missing, as this may compromise the safety and efficacy of the product.

For optimal storage conditions, the product should be maintained at a controlled room temperature between 15-30°C (59-86°F). It is essential to avoid exposure to excessive heat or humidity to preserve the quality of the product. Proper handling and storage are crucial to ensure the product remains effective and safe for use.

Additional Clinical Information

The medication is administered orally. Clinicians should advise patients who are pregnant or breastfeeding to consult a health professional prior to use. It is essential to keep the medication out of reach of children, and in the event of an accidental overdose, patients should seek medical assistance or contact a Poison Control Center immediately.

Drug Information (PDF)

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

Learn more in our Editorial Policy

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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.