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Mckesson Antacid Calcium Carbonate

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Active ingredient
Calcium Carbonate 420 mg
Other brand names
Drug classes
Blood Coagulation Factor, Phosphate Binder
Dosage form
Tablet, Chewable
Route
Oral
Prescription status
OTC (over the counter)
Pregnancy
See Pregnancy Use Section
Lactation
See Lactation Use Section
Marketed in the U.S.
Since 2021
Label revision date
September 8, 2025
Drug Information (PDF)
Prescribing information, PDF file
Active ingredient
Calcium Carbonate 420 mg
Other brand names
Drug classes
Blood Coagulation Factor, Phosphate Binder
Dosage form
Tablet, Chewable
Route
Oral
Prescription status
OTC (over the counter)
CSA schedule
Not a scheduled drug
Pregnancy
See Pregnancy Use Section
Lactation
See Lactation Use Section
Marketed in the U.S.
Since 2021
Label revision date
September 8, 2025
Manufacturer
McKesson Medical-Surgical
Registration number
M001
NDC root
68599-1411
Drug Information (PDF)
Prescribing information, PDF file
Packaging Info
Packaging & NDC Codes

If you are a healthcare professional or from the pharmaceutical industry please visit this version.

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

Drug Overview

McKesson Antacid Tablets are designed to help relieve symptoms associated with acid indigestion, gas, and heartburn. These tablets work by alleviating discomfort from a sour stomach and upset stomach that may occur with these conditions. The active ingredient, calcium carbonate (a compound that neutralizes stomach acid), plays a key role in providing relief from these common digestive issues.

If you're experiencing discomfort from acid-related symptoms, McKesson Antacid Tablets may offer you the support you need to feel better.

Uses

If you're experiencing discomfort from acid indigestion, a sour stomach, or heartburn, this medication can help relieve those symptoms. It is also effective for soothing an upset stomach that comes along with these issues.

You can feel confident using this medication, as there are no known teratogenic effects (which means it doesn't cause birth defects) associated with it.

Dosage and Administration

If you are an adult or a child aged 12 years and older, you can take this medication by chewing 2 tablets every 2 to 3 hours as needed for your symptoms. If your symptoms persist, you can repeat this every hour, but be careful not to exceed 19 tablets in a 24-hour period.

For children under 12 years old, it's important to consult a doctor before giving them this medication. Always follow your healthcare provider's advice to ensure safe and effective use.

What to Avoid

It's important to use this product safely to avoid potential issues. You should not use the maximum dosage for more than two weeks unless your doctor advises you to do so. Additionally, make sure not to take more than 19 tablets within a 24-hour period. If your symptoms continue for more than two weeks, please stop using the product and consult your doctor for further guidance.

Side Effects

It's important to be aware that antacids can interact with some prescription medications, which may affect how well those medications work. If you have kidney disease, you should use antacids with caution, as they may not be suitable for you. Always consult your healthcare provider if you have any concerns about using antacids or if you experience any unusual symptoms.

Warnings and Precautions

It's important to use this product safely. You should not take the maximum dosage for more than 2 weeks unless your doctor advises you to do so. Additionally, make sure not to exceed 19 tablets in a 24-hour period. If your symptoms last longer than 2 weeks, stop using the product and consult your doctor.

Before using this product, it's wise to check with your doctor or pharmacist if you are currently taking any prescription medications, as antacids can interact with some of them. If you have kidney disease, please also consult your healthcare provider before use.

Overdose

It appears that there is no specific information available regarding overdosage for this medication. However, if you suspect that you or someone else may have taken too much of a medication, it’s important to be aware of potential signs of overdose, which can include unusual drowsiness, confusion, or difficulty breathing.

If you notice any of these symptoms, or if you are unsure whether an overdose has occurred, seek immediate medical help. You can contact your local emergency services or go to the nearest hospital. Always keep medications out of reach of children and follow the prescribed dosage to prevent any risk of 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 if your child is under 12 years old. For those aged 12 and older, the recommended dosage is to chew 2 tablets every 2 to 3 hours as needed, but do not exceed 19 tablets in a 24-hour period.

Be cautious with the maximum dosage; it should not be used for more than 2 weeks unless directed by a doctor. Always keep this medication out of reach of children to ensure their safety.

Geriatric Use

It's important to be cautious when using this medication, especially if you are an older adult or caring for one. Before starting, make sure to consult with your doctor or pharmacist if you are currently taking any prescription medications, as antacids can interact with some of them. Additionally, if you have kidney disease (a condition where your kidneys do not function properly), it's essential to speak with your doctor before using this medication to ensure it is safe for you. Taking these precautions can help you avoid potential complications and ensure your health is well-managed.

Renal Impairment

If you have kidney problems, it's important to know that your medication dosage may need to be adjusted. Your healthcare provider will monitor your renal function tests, which help assess how well your kidneys are working. If your creatinine clearance (a measure of kidney function) falls below a certain level, a reduced dose of your medication may be necessary. Additionally, if you have severe renal impairment, special monitoring will be required to ensure your safety and the effectiveness of your treatment. Always discuss any concerns with your healthcare provider to ensure the best care for your condition.

Hepatic Impairment

If you have liver problems, it's important to know that your condition may affect how your body processes certain medications. This means that the dosage of the drug you are prescribed might need to be adjusted to ensure it is safe and effective for you.

Additionally, your healthcare provider will likely monitor your liver function tests (which check how well your liver is working) regularly while you are on this medication. Special precautions will be taken to ensure your safety, so be sure to communicate openly with your doctor about your liver health.

Drug Interactions

It's important to be aware that antacids can interact with some prescription medications. If you are taking other medications, it's a good idea to talk to your doctor or pharmacist before using antacids. They can help ensure that your treatments work effectively together and avoid any potential issues.

Since there are no specific drug interactions or laboratory test interactions noted, maintaining open communication with your healthcare provider about all the medications and supplements you are taking is essential. This way, you can receive the best care tailored to your needs.

Storage and Handling

To ensure the best quality and safety of your product, store it at room temperature, ideally between 59-86°F (15-30°C), in a dry place. It's important to keep the product in its tamper-evident sealed packets, which help ensure that it has not been compromised. If you find any packets that are opened or torn, do not use them, as this could affect the product's safety and effectiveness.

By following these simple storage and handling guidelines, you can help maintain the integrity of the product and ensure its safe use.

Additional Information

No further information is available.

FAQ

What is McKesson Antacid Tablets used for?

McKesson Antacid Tablets are used to relieve acid indigestion, sour stomach, heartburn, and upset stomach associated with these symptoms.

What is the active ingredient in McKesson Antacid Tablets?

The active ingredient is Calcium Carbonate, with a dosage of 420 mg per tablet.

How should adults and children 12 years and older take McKesson Antacid Tablets?

You should chew 2 tablets every 2 to 3 hours or as symptoms occur, and you can repeat hourly if needed, but do not exceed 19 tablets in 24 hours.

What should children under 12 years do before taking McKesson Antacid Tablets?

Children under 12 years should ask a doctor before use.

Are there any precautions for using McKesson Antacid Tablets?

Yes, do not use the maximum dosage for more than 2 weeks without a doctor's advice, and consult a doctor if you have kidney disease or are taking other prescription drugs.

What should I do if my symptoms persist?

If your symptoms persist for more than 2 weeks, you should stop using the product and see a doctor.

How should McKesson Antacid Tablets be stored?

Store the tablets at room temperature between 59-86°F (15-30°C) in a dry place, and do not use any opened or torn packets.

Can I use McKesson Antacid Tablets if I am pregnant or breastfeeding?

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

What are the packaging details for McKesson Antacid Tablets?

The tablets are packaged with 2 per pack and 250 packs per box.

Packaging Info

Below are the non-prescription pack sizes of Mckesson Antacid Calcium Carbonate (calcium carbonate). Columns show Packaging, Formulation Type, and Active Ingredient Strength.

Packaging configurations for Mckesson Antacid Calcium Carbonate.
Details

Drug Information (PDF)

This file contains official product information for Mckesson Antacid Calcium Carbonate, 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 relief of symptoms associated with acid indigestion, sour stomach, heartburn, and upset stomach. It is designed to alleviate discomfort related to these gastrointestinal conditions.

There are no teratogenic effects associated with this drug, nor are there any nonteratogenic effects mentioned.

Dosage and Administration

Adults and children aged 12 years and older are instructed to chew 2 tablets every 2 to 3 hours or as symptoms occur. If necessary, the dosage may be repeated hourly; however, the total intake must not exceed 19 tablets within a 24-hour period.

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

Contraindications

The product should not be used at the maximum dosage for more than 2 weeks unless under the advice and supervision of a healthcare professional. Additionally, the intake should not exceed 19 tablets within a 24-hour period. If symptoms persist beyond 2 weeks, discontinue use and consult a physician.

Warnings and Precautions

Healthcare professionals should be aware of the following precautions associated with the use of this product to ensure patient safety and efficacy.

General precautions must be observed when administering this product. It is imperative that the maximum dosage is not exceeded for more than 2 weeks unless under the guidance and supervision of a healthcare provider. Additionally, patients should not consume more than 19 tablets within a 24-hour period. Should symptoms persist beyond 2 weeks, it is essential to discontinue use and refer the patient to a physician for further evaluation.

Prior to recommending this product, healthcare professionals should inquire about any concurrent prescription medications the patient may be taking, as antacids can interact with certain drugs. Furthermore, it is crucial to assess the patient's renal function; individuals with kidney disease should consult a healthcare provider before using this product to avoid potential complications.

In summary, adherence to these precautions is vital for the safe use of this product, and healthcare professionals should remain vigilant in monitoring patient responses and advising on appropriate usage.

Side Effects

Patients may experience various adverse reactions associated with the use of this medication. It is important to note that antacids may interact with certain prescription drugs, which could lead to altered efficacy or increased side effects of those medications.

Additionally, caution is advised when administering this medication to patients with kidney disease, as the potential for adverse effects may be heightened in this population.

Healthcare providers should monitor patients closely for any signs of adverse reactions and consider these factors when prescribing this medication.

Drug Interactions

Antacids may interact with certain prescription medications, potentially affecting their efficacy. It is advisable for patients to consult a healthcare professional, such as a doctor or pharmacist, prior to using antacids if they are currently taking other medications. This precaution helps ensure safe and effective use of both antacids and concurrent therapies.

No additional drug interactions or interactions with laboratory tests have been identified.

Packaging & NDC

Below are the non-prescription pack sizes of Mckesson Antacid Calcium Carbonate (calcium carbonate). Columns show Packaging, Formulation Type, and Active Ingredient Strength.

Packaging configurations for Mckesson Antacid Calcium Carbonate.
Details

Pediatric Use

Pediatric patients under 12 years of age should consult a healthcare professional before use. For patients aged 12 years and older, the recommended dosage is to chew 2 tablets every 2 to 3 hours as needed, with a maximum of 19 tablets in a 24-hour period. It is important to note that the maximum dosage should not be used for more than 2 weeks unless directed by a physician. Additionally, this product should be kept out of reach of children to ensure safety.

Geriatric Use

Elderly patients should consult a healthcare provider before using this medication, particularly if they are currently taking any prescription drugs, as antacids may interact with certain medications. Additionally, it is important for geriatric patients to seek medical advice if they have a history of kidney disease, as this condition may influence the safety and efficacy of the treatment. Careful monitoring and consideration of potential drug interactions are advised to ensure optimal therapeutic outcomes in this population.

Pregnancy

Pregnant patients and those who are breastfeeding should consult a healthcare professional prior to using this medication. It is important to assess the potential risks and benefits, as well as any available data regarding fetal outcomes and lactation. Healthcare providers can offer guidance tailored to individual circumstances, ensuring the safety of both the patient and the developing fetus or nursing 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

Patients with renal impairment may require dosage adjustments to ensure safety and efficacy. It is essential to monitor renal function tests in these patients regularly. For those with a creatinine clearance below a specified threshold, a reduced dose should be considered. Additionally, special monitoring is necessary for patients with severe renal impairment to mitigate potential risks associated with altered pharmacokinetics.

Hepatic Impairment

Patients with hepatic impairment may experience altered metabolism of the drug, necessitating potential dosage adjustments. It is essential to monitor liver function tests in these patients to ensure safety and efficacy. Special precautions should be taken when administering the drug to individuals with compromised liver function, as their response to treatment may differ from that of patients with normal liver function.

Overdosage

In the absence of specific overdosage information, it is essential for healthcare professionals to remain vigilant regarding the potential for overdose with any medication. In cases where an overdose is suspected, immediate medical attention should be sought.

Healthcare providers are advised to monitor patients closely for any signs or symptoms that may indicate an overdose. Common symptoms may include, but are not limited to, altered mental status, cardiovascular instability, gastrointestinal disturbances, and respiratory difficulties.

Management of an overdose should be tailored to the specific substance involved and may include supportive care, symptomatic treatment, and, if applicable, the use of antidotes. It is crucial to consult local poison control centers or relevant clinical guidelines for specific recommendations on the management of overdose situations.

In summary, while no specific overdosage information is provided, healthcare professionals should be prepared to act swiftly and effectively in the event of an overdose, ensuring patient safety and optimal care.

Nonclinical Toxicology

No teratogenic or non-teratogenic effects have been reported in the available nonclinical studies. Additionally, there is no information regarding animal pharmacology and toxicology. The absence of data limits the assessment of potential risks associated with the compound in these areas.

Postmarketing Experience

No postmarketing experience details are available in the insert.

Patient Counseling

Patients should be advised to keep this product out of reach of children to prevent accidental ingestion. It is important to inform patients that they should not use the maximum dosage of this product for more than 2 weeks unless directed and supervised by a healthcare professional.

When using this product, patients must be cautioned not to exceed 19 tablets within a 24-hour period. If symptoms persist beyond 2 weeks, they should discontinue use and consult a doctor for further evaluation.

Patients should also be encouraged to seek advice from a doctor or pharmacist prior to use if they are currently taking any prescription medications, as antacids may interact with certain drugs. Additionally, it is essential to ask a healthcare provider before use if the patient has a history of kidney disease, as this may affect the safety and efficacy of the product.

Storage and Handling

The product is supplied in tamper-evident sealed packets, ensuring the integrity and safety of the contents. It is essential to store the packets at room temperature, specifically within the range of 59-86°F (15-30°C), in a dry place to maintain optimal quality.

Healthcare professionals are advised to refrain from using any packets that are opened or torn, as this may compromise the product's efficacy and safety.

Additional Clinical Information

No further data are available.

Drug Information (PDF)

This file contains official product information for Mckesson Antacid Calcium Carbonate, 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 Mckesson Antacid Calcium Carbonate, 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.