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Onessip Adult Daytime Severe Cold and Flu

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Active ingredients
  • Acetaminophen 650 mg/15 mL
  • Guaifenesin 400 mg/15 mL
  • Dextromethorphan Hydrobromide 20 mg/15 mL
  • Phenylephrine Hydrochloride 10 mg/15 mL
Other brand names
Drug classes
Expectorant, Sigma-1 Agonist, Uncompetitive N-methyl-D-aspartate Receptor Antagonist, alpha-1 Adrenergic Agonist
Dosage form
Solution
Route
Oral
Prescription status
OTC (over the counter)
Marketed in the U.S.
Since 2025
Label revision date
December 15, 2025
Active ingredients
  • Acetaminophen 650 mg/15 mL
  • Guaifenesin 400 mg/15 mL
  • Dextromethorphan Hydrobromide 20 mg/15 mL
  • Phenylephrine Hydrochloride 10 mg/15 mL
Other brand names
Drug classes
Expectorant, Sigma-1 Agonist, Uncompetitive N-methyl-D-aspartate Receptor Antagonist, alpha-1 Adrenergic Agonist
Dosage form
Solution
Route
Oral
Prescription status
OTC (over the counter)
CSA schedule
Not a scheduled drug
Marketed in the U.S.
Since 2025
Label revision date
December 15, 2025
Manufacturer
MEDWISE LIFESCIENCES INC.
Registration number
M012
NDC root
87078-972

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Drug Overview

DayQuil is a medication designed to temporarily relieve symptoms associated with the common cold and flu. It helps alleviate nasal and sinus congestion, pressure, and swelling, making it easier for you to breathe. Additionally, DayQuil can relieve cough caused by minor throat and bronchial irritation, as well as reduce minor aches, pains, headaches, fever, and sore throat.

The way DayQuil works is by loosening phlegm (mucus) and thinning bronchial secretions, which helps clear out mucus from your airways and makes coughing more productive. This combination of effects can provide you with much-needed relief when you're feeling under the weather.

Uses

This medication is designed to temporarily relieve a variety of common cold and flu symptoms that you might experience. If you're dealing with nasal or sinus congestion and pressure, this product can help reduce swelling in your nasal passages, making it easier for you to breathe. It also addresses minor aches and pains, headaches, fever, and sore throats.

In addition to easing these discomforts, this medication promotes drainage in your nasal and sinus areas. It helps loosen phlegm (a thick mucus) and thins bronchial secretions, which can make your coughs more productive by clearing out bothersome mucus from your airways. Overall, it aims to provide you with relief so you can feel more comfortable while you recover.

Dosage and Administration

When using this medication, it’s important to follow the directions carefully. You should take it only as directed and not exceed four doses (or four sachets) in a 24-hour period. For your convenience, the carton includes instructions to help you use it easily.

For adults and children aged 12 years and older, the recommended dosage is 15 mL (which is one sachet) every four hours. If you have children between the ages of 4 and 12, it’s best to consult a doctor for the appropriate dosage. Please remember that this medication is not suitable for children under 4 years old, so do not use it for them.

What to Avoid

You should avoid using this product if you are currently taking any other medication that contains acetaminophen, whether it's a prescription or over-the-counter drug. If you're unsure whether a medication contains acetaminophen, please consult your doctor or pharmacist. Additionally, do not use this product if you are taking a prescription monoamine oxidase inhibitor (MAOI) for conditions like depression or Parkinson's disease, or for two weeks after stopping an MAOI. Again, if you're uncertain about your medications, it's best to ask a healthcare professional.

While using this product, make sure to follow the dosage instructions carefully and do not exceed the recommended amount. Taking more than directed can lead to serious health issues. Always prioritize your safety and well-being by seeking guidance when needed.

Side Effects

You should be aware of some important side effects and warnings associated with this medication. Taking more than the recommended doses can lead to severe liver damage, especially if you consume alcohol or use other products containing acetaminophen. Additionally, be cautious of potential severe skin reactions, which may include symptoms like skin reddening, blisters, or rash. If you experience any of these skin issues, stop using the product and seek medical help immediately.

It's also important to consult a doctor if you have a severe sore throat that lasts more than two days or is accompanied by fever, headache, rash, nausea, or vomiting. Other reasons to stop using the medication and contact a healthcare professional include feeling nervous, dizzy, or having trouble sleeping, as well as if your pain or cough worsens or lasts longer than the specified time frames. Always talk to your doctor before using this medication if you have certain health conditions, such as liver disease, heart disease, or if you are taking blood thinners like warfarin.

Warnings and Precautions

This product contains acetaminophen, which can lead to severe liver damage if you exceed the recommended doses—more than 4 doses (30 mL each) in 24 hours for adults or more than 4 doses (15 mL each) for children. Be cautious if you consume three or more alcoholic drinks daily while using this product, or if you are taking other medications that also contain acetaminophen.

You should be aware that acetaminophen may cause serious skin reactions, including redness, blisters, or rashes. If you experience any of these symptoms, stop using the product and seek medical help immediately. Additionally, if you have a sore throat that is severe, lasts more than two days, or is accompanied by fever, headache, rash, nausea, or vomiting, consult your doctor right away.

In case of an overdose, it is crucial to get emergency medical help or contact a Poison Control Center immediately, even if you do not notice any symptoms. You should also stop using the product and call your doctor if you feel nervous, dizzy, or unable to sleep, if your pain or cough worsens or lasts longer than the specified time, or if you notice any new symptoms.

Overdose

Taking more than the recommended amount of this medication can lead to serious health issues. For adults, consuming more than 4 doses (30 mL each) within 24 hours can cause severe liver damage. For children, taking more than 4 doses (15 mL each) in the same time frame poses a similar risk.

If you notice any unusual skin reactions, it’s important to stop using the medication immediately and seek medical help. Signs of an overdose can include these skin reactions, and it’s crucial to act quickly to prevent further complications. Always prioritize your health and consult a healthcare professional if you suspect an overdose has 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 using this medication for children, it's important to follow specific guidelines to ensure their safety. For children aged 4 to under 12 years, you should consult a doctor for the correct dosing instructions. If your child is under 4 years old, this medication should not be used at all.

Additionally, keep in mind that the maximum amount of this medication for children is 4 doses of 15 mL each within a 24-hour period. Always adhere to these recommendations to help protect your child's health.

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 standard recommendations for the medication do not include special monitoring or safety considerations tailored for patients with renal impairment (kidney issues).

Always consult your healthcare provider for personalized advice and to ensure that any treatment plan is safe and effective for your specific health needs. They can provide guidance based on your kidney function and overall health.

Hepatic Impairment

If you have liver problems, it's important to be cautious when using this product, which contains acetaminophen. To avoid severe liver damage, you should not exceed 4 doses (30 mL each) in a 24-hour period if you are an adult, or 4 doses (15 mL each) if you are a child. Additionally, be aware that taking this product alongside other medications that also contain acetaminophen can increase the risk of liver damage. If you consume 3 or more alcoholic drinks daily, you should avoid this product altogether, as it can further strain your liver.

Always consult with your healthcare provider for personalized advice, especially if you have existing liver conditions. They can help you determine the safest options for your health.

Drug Interactions

It's important to have open conversations with your healthcare provider about any medications or tests you may be taking. While there are no specific drug interactions or laboratory test interactions noted for this medication, your healthcare provider can help ensure that everything you are taking works well together and is safe for you.

Always feel free to ask questions and share your complete list of medications and any lab tests you may be undergoing. This way, you can receive the best possible care tailored to your needs.

Storage and Handling

To ensure the best performance of your product, store it in a cool, dry place at a temperature between 20-25°C (68-77°F). This helps maintain its effectiveness and safety.

When handling the product, be cautious not to use it if the carton or sachet is torn, broken, or punctured, as this could compromise its integrity and safety. Always check the packaging before use to ensure it is intact.

Additional Information

No further information is available.

FAQ

What is DayQuil used for?

DayQuil temporarily relieves common cold and flu symptoms, including nasal congestion, sinus pressure, cough, minor aches and pains, headache, fever, and sore throat.

How should I take DayQuil?

Take DayQuil only as directed. Adults and children 12 years and over should take 15 mL (1 sachet) every 4 hours, not exceeding 4 doses in 24 hours.

Are there any contraindications for using DayQuil?

Do not use DayQuil with any other drug containing acetaminophen or if you are taking a prescription monoamine oxidase inhibitor (MAOI).

What should I do if I experience severe skin reactions?

If you experience severe skin reactions such as reddening, blisters, or rash, stop using DayQuil and seek medical help immediately.

What are the liver warnings associated with DayQuil?

Severe liver damage may occur if you take more than the recommended doses, take it with other acetaminophen-containing drugs, or consume 3 or more alcoholic drinks daily while using it.

What should I do if my symptoms worsen or do not improve?

Stop using DayQuil and consult a doctor if your pain, nasal congestion, or cough worsens or lasts more than the specified duration.

Can I use DayQuil if I am pregnant or breastfeeding?

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

What should I do in case of an overdose?

In case of overdose, seek medical help or contact a Poison Control Center immediately, as quick medical attention is critical.

Packaging Info

Below are the non-prescription pack sizes of Onessip Adult Daytime Severe Cold and Flu (acetaminophen, dextromethorphan hbr, guaifenesin, phenylephrine hci). Columns show Packaging, Formulation Type, and Active Ingredient Strength.

Packaging configurations for Onessip Adult Daytime Severe Cold and Flu.
Details

Drug Information (PDF)

This file contains official product information for Onessip Adult Daytime Severe Cold and Flu, 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 symptoms associated with the common cold and influenza. Specifically, it addresses the following symptoms: nasal congestion, sinus congestion and pressure, cough due to minor throat and bronchial irritation, minor aches and pains, headache, fever, and sore throat.

Additionally, this drug reduces swelling of the nasal passages, temporarily restores freer breathing through the nose, promotes nasal and/or sinus drainage, and helps to loosen phlegm (mucus) and thin bronchial secretions. This action aids in clearing the bronchial passageways of bothersome mucus, thereby making coughs more productive.

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

Dosage and Administration

Patients should take the medication only as directed and must not exceed a total of 4 doses (4 sachets) within a 24-hour period. It is essential to follow the instructions provided on the carton for proper use.

For adults and children aged 12 years and older, the recommended dosage is 15 mL (1 sachet) every 4 hours as needed. For children aged 4 to under 12 years, it is advised to consult a physician for appropriate dosing. The medication is not recommended for use in children under 4 years of age.

Contraindications

Use of this product is contraindicated in the following situations:

  • Co-administration with any other drug containing acetaminophen, whether prescription or nonprescription, due to the risk of acetaminophen overdose. If there is uncertainty regarding the presence of acetaminophen in other medications, consultation with a healthcare professional is advised.

  • Concurrent use with prescription monoamine oxidase inhibitors (MAOIs) is contraindicated. This includes certain medications prescribed for depression, psychiatric or emotional conditions, or Parkinson's disease. Additionally, use is contraindicated for 2 weeks following the discontinuation of an MAOI. Patients should verify with a healthcare professional if their prescription medications contain an MAOI before using this product.

Warnings and Precautions

This product contains acetaminophen, which carries significant risks for liver damage. Healthcare professionals should advise patients that severe liver damage may occur if an adult exceeds 4 doses (30 mL each) within a 24-hour period, or if a child exceeds 4 doses (15 mL each) in the same timeframe. Additionally, the risk of liver damage increases if the product is taken concurrently with other medications containing acetaminophen or if the adult consumes 3 or more alcoholic drinks daily while using this product.

Allergy Alert Acetaminophen may induce severe skin reactions. Symptoms indicative of such reactions include skin reddening, blisters, and rash. Should any of these symptoms manifest, patients must be instructed to discontinue use immediately and seek medical assistance.

Sore Throat Warning In cases of severe sore throat that persists for more than 2 days, or if accompanied by fever, headache, rash, nausea, or vomiting, patients should be advised to consult a healthcare provider promptly.

In the event of an overdose, it is imperative to seek emergency medical help or contact a Poison Control Center without delay. Rapid medical intervention is crucial for both adults and children, even in the absence of noticeable signs or symptoms.

Patients should be instructed to stop taking the product and consult a healthcare professional if they experience any of the following: nervousness, dizziness, or sleeplessness; worsening pain, nasal congestion, or cough lasting more than 5 days in children or 7 days in adults; fever that worsens or persists beyond 3 days; presence of redness or swelling; emergence of new symptoms; or recurrence of cough accompanied by rash or headache that lasts.

Side Effects

Severe liver damage may occur in patients who exceed the recommended dosage of this product, specifically if an adult takes more than 4 doses (30 mL each) within a 24-hour period, or if a child takes more than 4 doses (15 mL each) in the same timeframe. The risk of liver damage is further increased when this product is taken in conjunction with other medications containing acetaminophen or if an adult consumes 3 or more alcoholic drinks daily while using this product.

Patients should be aware of the potential for severe skin reactions associated with acetaminophen, which may manifest as skin reddening, blisters, or rash. In the event of a skin reaction, it is imperative to discontinue use and seek medical assistance immediately.

Participants should also be advised to consult a healthcare provider if they experience a sore throat that is severe, persists for more than 2 days, or is accompanied by fever, headache, rash, nausea, or vomiting.

Common adverse reactions that warrant discontinuation of use and consultation with a healthcare professional include nervousness, dizziness, or sleeplessness. Additionally, if pain, nasal congestion, or cough worsens or lasts beyond 5 days in children or 7 days in adults, or if fever worsens or lasts more than 3 days, patients should seek medical advice. Redness or swelling, the emergence of new symptoms, or a cough that recurs or is accompanied by a rash or headache lasting longer than expected also necessitate medical consultation.

Patients with pre-existing conditions such as liver disease, heart disease, high blood pressure, thyroid disease, diabetes, or those experiencing difficulty urinating due to an enlarged prostate gland should consult a healthcare provider prior to use. Furthermore, individuals with a cough that produces excessive phlegm or those suffering from persistent or chronic coughs, such as those associated with smoking, asthma, chronic bronchitis, or emphysema, should also seek medical advice before using this product.

It is advisable for patients taking the blood-thinning medication warfarin to consult a doctor or pharmacist before using this product to avoid potential interactions.

Drug Interactions

There are currently no documented drug interactions associated with this medication. Additionally, there are no known interactions with laboratory tests. As such, no specific recommendations for dosage adjustments or monitoring are necessary at this time.

Packaging & NDC

Below are the non-prescription pack sizes of Onessip Adult Daytime Severe Cold and Flu (acetaminophen, dextromethorphan hbr, guaifenesin, phenylephrine hci). Columns show Packaging, Formulation Type, and Active Ingredient Strength.

Packaging configurations for Onessip Adult Daytime Severe Cold and Flu.
Details

Pediatric Use

Pediatric patients aged 4 to under 12 years should receive dosing instructions from a healthcare professional. For children under 4 years of age, the use of this medication is not recommended. The maximum daily dosage for pediatric patients is limited to 4 doses of 15 mL each within a 24-hour period.

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.

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 considered in these populations to ensure the safety of both the mother and the fetus or infant.

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

There is no specific information available regarding dosage adjustments, special monitoring, or safety considerations for patients with renal impairment. Healthcare professionals should exercise caution when prescribing to patients with reduced kidney function, as the absence of detailed guidance necessitates careful clinical judgment. Regular monitoring of renal function may be advisable in this patient population.

Hepatic Impairment

Patients with hepatic impairment should be closely monitored when using this product, which contains acetaminophen. Severe liver damage may occur if the following conditions are met:

  • Adults should not exceed 4 doses (30 mL each) in a 24-hour period, which is the maximum daily amount for this product.

  • Children should not exceed 4 doses (15 mL each) in a 24-hour period, which is also the maximum daily amount for this product.

  • Caution is advised if this product is taken concurrently with other medications containing acetaminophen, as this may increase the risk of liver damage.

  • Adults who consume 3 or more alcoholic drinks daily while using this product are at an elevated risk for severe liver damage.

Due to these risks, it is recommended that patients with compromised liver function consult a healthcare professional for appropriate dosage adjustments and monitoring.

Overdosage

Severe liver damage is a potential consequence of overdosage with this product. For adults, the risk increases significantly if more than 4 doses (30 mL each) are taken within a 24-hour period, exceeding the maximum recommended daily amount. Similarly, for children, taking more than 4 doses (15 mL each) in the same timeframe poses a serious risk of severe liver damage.

In the event of an overdose, it is crucial to stop use and seek medical help immediately if any skin reactions occur. Such reactions may indicate an overdose or a severe adverse reaction, necessitating prompt medical evaluation and intervention.

Healthcare professionals should monitor patients for symptoms of liver damage and provide appropriate management based on clinical presentation and laboratory findings.

Nonclinical Toxicology

No teratogenic effects have been identified in the available nonclinical studies. Additionally, there is no information regarding non-teratogenic effects. The data does not provide insights into animal pharmacology and toxicology. Furthermore, there are no findings related to carcinogenesis or mutagenesis. Overall, the nonclinical toxicology data remains limited and does not indicate any significant adverse effects in the evaluated studies.

Postmarketing Experience

Acetaminophen has been associated with severe skin reactions reported in postmarketing surveillance. Symptoms of these reactions may include skin reddening, blisters, and rash. In the event of a skin reaction, it is advised to discontinue use and seek medical assistance immediately.

Patient Counseling

Healthcare providers should advise patients to keep this medication out of reach of children to prevent accidental ingestion. In the event of an overdose, patients must seek medical help or contact a Poison Control Center immediately, as prompt medical attention is crucial for both adults and children, even if no signs or symptoms are apparent.

Patients should be informed not to use this medication in conjunction with any other drug containing acetaminophen, whether prescription or nonprescription. If patients are uncertain whether a drug contains acetaminophen, they should consult a doctor or pharmacist for clarification.

It is essential to caution patients against using this medication if they are currently taking a prescription monoamine oxidase inhibitor (MAOI) or have taken one within the past two weeks. Patients should be encouraged to ask their healthcare provider or pharmacist if they are unsure whether their prescription medication contains an MAOI.

Patients should be instructed to discontinue use and consult a doctor if they experience nervousness, dizziness, or sleeplessness. Additionally, they should seek medical advice if pain, nasal congestion, or cough worsens or persists beyond 5 days for children or 7 days for adults. If fever worsens or lasts more than 3 days, or if redness or swelling occurs, patients should also stop use and contact a healthcare professional. New symptoms or a cough that returns or occurs with a rash or persistent headache should prompt immediate medical consultation, as these may indicate a serious condition.

While using this product, patients must adhere strictly to the recommended dosage and not exceed the directed amount. It is advisable for patients to consult a doctor before using this medication if they have liver disease, heart disease, high blood pressure, thyroid disease, diabetes, or difficulty urinating due to an enlarged prostate gland. Patients should also seek medical advice if they have a cough accompanied by excessive phlegm or a persistent cough associated with smoking, asthma, chronic bronchitis, or emphysema. Those on a sodium-restricted diet or taking the blood-thinning medication warfarin should also consult a healthcare provider or pharmacist before use.

Storage and Handling

The product is supplied in packaging that includes NDC numbers relevant to its configuration. It should be stored at a temperature range of 20-25°C (68-77°F) to maintain its integrity and efficacy. Healthcare professionals are advised to inspect the carton and sachet prior to use; the product should not be utilized if either is found to be torn, broken, or punctured. Proper handling and storage conditions are essential to ensure the product remains safe and effective for patient use.

Additional Clinical Information

No further data are available.

Drug Information (PDF)

This file contains official product information for Onessip Adult Daytime Severe Cold and Flu, 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 Onessip Adult Daytime Severe Cold and Flu, 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.