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Kirkland Signature Acetaminophen

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Active ingredient
Acetaminophen 500 mg
Other brand names
Dosage form
Tablet
Route
Oral
Prescription status
OTC (over the counter)
Marketed in the U.S.
Since 2009
Label revision date
September 27, 2025
Active ingredient
Acetaminophen 500 mg
Other brand names
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
September 27, 2025
Manufacturer
Costco Wholesale Company
Registration number
M013
NDC root
63981-700

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Drug Overview

KIRKLAND Signature EXTRA STRENGTH ACETAMINOPHEN is a pain reliever and fever reducer designed for adults. It temporarily alleviates minor aches and pains caused by various conditions, including the common cold, headaches, backaches, arthritis, muscular aches, toothaches, and menstrual cramps. Additionally, it helps to reduce fever, making it a versatile option for managing discomfort.

This medication contains 500 mg of acetaminophen (a common active ingredient in pain relief) per caplet, and it is formulated to be easy to swallow. If you're looking for effective relief from everyday aches and pains, KIRKLAND Signature EXTRA STRENGTH ACETAMINOPHEN may be a suitable choice.

Uses

You can use this medication to temporarily relieve minor aches and pains caused by various conditions, including the common cold, headaches, backaches, and muscular aches. It is also effective for easing minor arthritis pain, toothaches, and menstrual cramps. Additionally, this medication can help reduce fever temporarily.

It's important to note that there are no reported teratogenic effects (which means it does not cause birth defects) associated with this medication.

Dosage and Administration

If you are an adult or a child aged 12 years and older, you should take 2 caplets every 6 hours as long as you have symptoms. However, make sure not to exceed 6 caplets in a 24-hour period unless your doctor advises otherwise. It's also important to limit your use to no more than 10 days unless directed by a healthcare professional.

For children under 12 years of age, it's best to consult a doctor before giving them this medication. This ensures that they receive the appropriate care and dosage for their specific needs.

What to Avoid

You should avoid using this product if you have ever had an allergic reaction to it or any of its ingredients. Additionally, it is important not to take this product alongside any other medications that contain acetaminophen, whether they are prescription or over-the-counter. If you're unsure whether a medication contains acetaminophen, please consult with your doctor or pharmacist for guidance. Taking these precautions will help ensure your safety and well-being.

Side Effects

Taking this medication can lead to some serious side effects, particularly concerning your liver. It's important to avoid exceeding 4,000 mg of acetaminophen in a 24-hour period, using it alongside other acetaminophen-containing products, or consuming three or more alcoholic drinks daily while on this medication, as these actions can significantly increase the risk of severe liver damage.

You should also be aware of potential allergic reactions, which may include severe skin issues like reddening, blisters, or rashes. If you experience any of these symptoms, stop using the medication and seek medical help immediately. Additionally, if your pain worsens or lasts more than 10 days, if new symptoms arise, or if a fever persists for more than three days, consult a doctor, as these could indicate a more serious condition. Always talk to your doctor if you have liver disease or are taking blood thinners like warfarin. In case of an overdose, seek medical assistance right away, even if you don't notice any symptoms.

Warnings and Precautions

This product contains acetaminophen, which can lead to severe liver damage if you take more than 4,000 mg in 24 hours, use it with other medications containing acetaminophen, or consume three or more alcoholic drinks daily while using it. Be aware that acetaminophen may also cause serious skin reactions, such as redness, blisters, or rash. If you experience any skin reactions, stop using the product and seek medical help immediately.

Before using this product, consult your doctor if you have liver disease or are taking the blood thinner warfarin. If you suspect an overdose, it’s crucial to get emergency medical help or contact a Poison Control Center at 1-800-222-1222, even if you don’t notice any symptoms. Additionally, stop using the product and call your doctor if your pain worsens or lasts more than 10 days, if new symptoms develop, if your fever worsens or lasts more than 3 days, or if you notice any redness or swelling, as these may indicate a serious condition.

Overdose

If you suspect an overdose, it’s important to seek medical help immediately. You can contact a Poison Control Center at 1-800-222-1222 for guidance. Quick action is crucial for both adults and children, even if you don’t see any signs or symptoms of an overdose.

Signs of an overdose can vary, but they may include unusual drowsiness, confusion, or difficulty breathing. If you notice any of these symptoms, don’t hesitate to get help right away. Remember, it’s always better to be safe and seek assistance if you have any concerns about an overdose.

Pregnancy Use

If you are pregnant or breastfeeding, it’s important to consult with a healthcare professional before using this medication. They can provide guidance on whether it’s safe for you and your baby. Always prioritize your health and the health of your child by seeking expert advice.

Lactation Use

If you are pregnant or breastfeeding, it’s important to consult with a healthcare professional before using any medication. This ensures that you understand any potential risks and can make informed decisions about your health and the health of your baby. Always prioritize open communication with your doctor regarding your breastfeeding journey.

Pediatric Use

If you are considering this medication for your child, it's important to consult a doctor first if your child is under 12 years old. For children aged 12 and older, the recommended dosage is 2 caplets every 6 hours as needed, but they should not exceed 6 caplets in a 24-hour period unless a doctor advises otherwise.

Additionally, you should not use this medication for more than 10 days without a doctor's guidance. In the event of an overdose, seek medical help immediately, even if your child does not show any symptoms. Your child's safety is the top priority, so always follow these guidelines closely.

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 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 should be used if you have renal impairment (kidney issues).

Always consult your healthcare provider for personalized advice and to ensure that any medication you take is safe and appropriate for your health situation. They can help determine the best course of action based on your kidney function and overall health.

Hepatic Impairment

If you have liver problems, it's important to be cautious when using products that contain acetaminophen. Taking more than 4,000 mg of acetaminophen in a 24-hour period, using other medications that also contain acetaminophen, or consuming three or more alcoholic drinks daily while using this product can lead to severe liver damage.

Before using this product, you should consult with your doctor if you have liver disease. They can provide guidance on safe usage and any necessary adjustments to your dosage. Your health and safety are the top priority, so don’t hesitate to seek professional advice.

Drug Interactions

It's important to talk to your doctor or pharmacist before using this medication, especially if you are taking warfarin, a blood-thinning drug. Combining these medications can increase the risk of bleeding, which can be serious. Always keep your healthcare provider informed about all the medications you are taking to ensure your safety and the effectiveness of your treatment.

Storage and Handling

To ensure the best performance and safety of your product, store it at a temperature between 20-25ºC (68-77ºF). This temperature range helps maintain the integrity of the device.

When handling the product, be sure to do so with clean hands and in a clean environment to avoid contamination. Always follow any specific disposal instructions provided to ensure safe and responsible disposal of any components.

Additional Information

You should take this medication orally, using 2 caplets every 6 hours while you have symptoms. Make sure not to exceed 6 caplets in a 24-hour period unless your doctor advises otherwise, and do not use it for more than 10 days without a doctor's guidance.

If you are pregnant or breastfeeding, consult a healthcare professional before using this medication. Keep it out of reach of children. In case of an overdose, seek medical help immediately or contact a Poison Control Center at 1-800-222-1222, as prompt attention is crucial for both adults and children, even if no symptoms are apparent.

FAQ

What is KIRKLAND Signature EXTRA STRENGTH ACETAMINOPHEN used for?

It is a pain reliever and fever reducer that temporarily relieves minor aches and pains due to conditions like the common cold, headache, backache, and menstrual cramps.

How should adults take KIRKLAND Signature EXTRA STRENGTH ACETAMINOPHEN?

Adults and children 12 years and over should take 2 caplets every 6 hours while symptoms last, without exceeding 6 caplets in 24 hours unless directed by a doctor.

Are there any warnings associated with this medication?

Yes, severe liver damage may occur if you take more than 4,000 mg in 24 hours, use with other acetaminophen-containing drugs, or consume 3 or more alcoholic drinks daily while using it.

What should I do in case of an overdose?

In case of overdose, seek medical help or contact a Poison Control Center immediately at 1-800-222-1222.

Can I use KIRKLAND Signature EXTRA STRENGTH ACETAMINOPHEN if I have liver disease?

You should ask a doctor before use if you have liver disease.

Is it safe to use KIRKLAND Signature EXTRA STRENGTH ACETAMINOPHEN during pregnancy or breastfeeding?

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

What should I do if I experience a skin reaction?

If you notice symptoms like skin reddening, blisters, or rash, stop use and seek medical help immediately.

What should I avoid while taking this medication?

Do not use with any other drug containing acetaminophen and avoid taking it if you have had an allergic reaction to it or any of its ingredients.

Packaging Info

Below are the non-prescription pack sizes of Kirkland Signature Acetaminophen (acetaminophen). Columns show Packaging, Formulation Type, and Active Ingredient Strength.

Packaging configurations for Kirkland Signature Acetaminophen.
Details

Drug Information (PDF)

This file contains official product information for Kirkland Signature Acetaminophen, 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 drug.

Uses and Indications

This drug is indicated for the temporary relief of minor aches and pains associated with various conditions, including the common cold, headache, backache, minor pain of arthritis, muscular aches, toothache, and premenstrual and menstrual cramps. Additionally, it is indicated for the temporary reduction of fever.

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

Dosage and Administration

Adults and children aged 12 years and over are instructed to take 2 caplets every 6 hours as needed for symptom relief. The maximum dosage should not exceed 6 caplets within a 24-hour period, unless otherwise directed by a healthcare professional. Additionally, the use of this medication should not extend beyond 10 days unless specifically advised by a doctor.

For children under 12 years of age, it is recommended to consult a healthcare professional for appropriate dosing guidance.

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.

  • History of allergic reaction to this product or any of its ingredients, as this may lead to severe hypersensitivity reactions.

Warnings and Precautions

Severe liver damage may occur with the use of this product, which contains acetaminophen. Healthcare professionals should advise patients that the risk of liver injury increases significantly if they exceed 4,000 mg of acetaminophen within a 24-hour period, use other medications containing acetaminophen concurrently, or consume three or more alcoholic beverages daily while taking this product.

Acetaminophen may also lead to 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.

It is essential for patients to consult a healthcare provider prior to using this product if they have a history of liver disease. Additionally, patients taking the anticoagulant warfarin should seek advice from a doctor or pharmacist before use, as potential interactions may occur.

In the event of an overdose, immediate medical attention is crucial. Patients should be directed to contact a Poison Control Center at 1-800-222-1222 or seek emergency medical help without delay, regardless of the presence of symptoms.

Patients should also be advised to stop taking the product and consult a healthcare professional if any of the following occur: pain worsens or persists for more than 10 days, new symptoms arise, fever intensifies or lasts longer than 3 days, or if redness or swelling is observed. These signs may indicate a serious underlying condition that requires further evaluation.

Side Effects

Severe liver damage may occur in patients who exceed 4,000 mg of acetaminophen within a 24-hour period, use other medications containing acetaminophen concurrently, or consume three 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 are advised to stop use and consult a healthcare professional if pain worsens or persists beyond 10 days, if new symptoms arise, if fever intensifies or lasts more than three days, or if redness or swelling is observed, as these may indicate a serious underlying condition.

Patients with liver disease should consult a doctor prior to use. Additionally, individuals taking the blood-thinning medication warfarin are advised to seek guidance from a healthcare provider or pharmacist before using this product.

In cases of overdose, it is crucial to obtain medical help or contact a Poison Control Center immediately at 1-800-222-1222. Prompt medical attention is essential for both adults and children, even if no signs or symptoms are apparent.

Drug Interactions

Patients taking warfarin, a blood-thinning medication, should consult with a healthcare professional prior to using this drug. The interaction between this drug and warfarin may necessitate careful monitoring of coagulation parameters to ensure therapeutic efficacy and minimize the risk of bleeding complications. Adjustments to the dosage of warfarin may be required based on the clinical judgment of the healthcare provider.

Packaging & NDC

Below are the non-prescription pack sizes of Kirkland Signature Acetaminophen (acetaminophen). Columns show Packaging, Formulation Type, and Active Ingredient Strength.

Packaging configurations for Kirkland Signature Acetaminophen.
Details

Pediatric Use

Pediatric patients under 12 years of age should consult a healthcare professional before use. For adolescents aged 12 years and older, the recommended dosage is 2 caplets every 6 hours as needed, with a maximum of 6 caplets in a 24-hour period, unless otherwise directed by a physician. It is important to note that the medication should not be used for more than 10 days without medical supervision.

In the event of an overdose, prompt medical attention is essential for both children and adults, even if no signs or symptoms are immediately apparent.

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. 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 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 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 individuals 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 should be advised of the potential risks associated with the use of this product, particularly due to its acetaminophen content. Severe liver damage may occur if the total daily dosage exceeds 4,000 mg of acetaminophen, especially when combined with other medications containing acetaminophen or when consuming three or more alcoholic drinks daily while using this product.

It is recommended that patients with liver disease consult a healthcare professional prior to using this product to assess the appropriateness of treatment and to discuss any necessary dosage adjustments or monitoring requirements.

Overdosage

In the event of an overdose, it is imperative to seek immediate medical assistance or contact a Poison Control Center at 1-800-222-1222. Prompt medical intervention is crucial for both adults and children, even in the absence of noticeable signs or symptoms.

Healthcare professionals should be aware that the presentation of symptoms may vary, and vigilance is necessary to ensure appropriate management. The potential for serious complications underscores the importance of rapid response in overdose situations.

Management procedures should include a thorough assessment of the patient's condition, monitoring vital signs, and providing supportive care as needed. It is essential to follow established protocols for overdose management, which may involve decontamination, administration of antidotes if applicable, and symptomatic treatment.

In summary, the key to effective management of an overdose lies in swift action and comprehensive care, ensuring the safety and well-being of the affected individual.

Nonclinical Toxicology

If pregnant or breast-feeding, it is advised to consult a health professional before use. No specific non-teratogenic effects have been identified in the available data. Additionally, there are no detailed findings regarding nonclinical toxicology or animal pharmacology and toxicology provided in the current information.

Postmarketing Experience

Postmarketing experience has identified that acetaminophen may be associated with severe skin reactions. Reports indicate that symptoms can 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 seek immediate medical assistance or contact a Poison Control Center at 1-800-222-1222 in the event of an overdose. It is crucial to emphasize that prompt medical attention is necessary for both adults and children, even if no signs or symptoms are apparent.

Patients should be informed not to use this product in conjunction with any other medications that contain acetaminophen, whether prescription or nonprescription. If patients are uncertain about the presence of acetaminophen in their medications, they should be encouraged to consult with a doctor or pharmacist.

It is important to instruct patients to discontinue use and consult a doctor if their pain worsens or persists for more than 10 days. Additionally, they should be advised to stop use and seek medical advice if they experience new symptoms, if their fever worsens or lasts more than 3 days, or if they notice any redness or swelling, as these may indicate a serious condition.

Patients with a history of allergic reactions to this product or any of its ingredients should be cautioned against its use. Furthermore, healthcare providers should recommend that patients with liver disease consult a doctor prior to using this product. Lastly, patients taking the blood-thinning medication warfarin should be advised to speak with a doctor or pharmacist before using this product.

Storage and Handling

The product is supplied in various package configurations, with specific NDC numbers available for identification. It is essential to store the product at a controlled temperature range of 20-25ºC (68-77ºF) to maintain its integrity and efficacy. Proper storage conditions must be adhered to, ensuring that the product is kept within the specified temperature limits to prevent degradation.

Additional Clinical Information

The medication is administered orally, with a recommended dosage of 2 caplets every 6 hours while symptoms persist. Patients should not exceed 6 caplets in a 24-hour period unless directed by a healthcare professional, and use should not extend beyond 10 days without medical advice.

Clinicians should counsel patients to consult a health professional if they are pregnant or breastfeeding. It is important to keep the medication out of reach of children. In the event of an overdose, patients are advised to seek immediate medical assistance or contact a Poison Control Center at 1-800-222-1222, as prompt attention is crucial for both adults and children, even in the absence of symptoms.

Drug Information (PDF)

This file contains official product information for Kirkland Signature Acetaminophen, 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 Kirkland Signature Acetaminophen, retrieved by a validated AI data-extraction workflow.

All FDA-listed dosage forms and strengths are shown in the Packaging & NDC Codes section above. Regulatory status appears in the Summary Information panel above and was verified in the FDA National Drug Code directory and the NSDE NDC Directory daily file.

Note: an automated daemon monitors NSDE checksums; when the record for this NDC changes, the new file is pulled instantly and this page is refreshed.

No human clinician has reviewed this version.

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Orange Book data shown on this page are limited to Regulatory Status (Rx), Established Pharmacologic Class (EPC), and Mechanism of Action (MoA).

Regulatory data notice: Information on this page is reproduced verbatim from FDA public databases (NSDE, Orange Book, Purple Book, DailyMed SPL). NDA/ANDA drugs are FDA-approved, BLA biologics are FDA-licensed. Inclusion alone does not guarantee current market availability or imply FDA endorsement.

Medical disclaimer: This AI-generated content is provided for educational purposes only and does not constitute medical advice. Always consult a licensed healthcare professional for diagnosis or treatment decisions.