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Cardinalextra Strength

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Active ingredient
Calcium Carbonate 750 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
October 14, 2025
Drug Information (PDF)
Prescribing information, PDF file
Active ingredient
Calcium Carbonate 750 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
October 14, 2025
Manufacturer
CARDINAL HEALTH
Registration number
M001
NDC root
70000-0592
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

LDR Extra Strength Calcium Carbonate is an antacid medication that comes in the form of chewable tablets, each containing 750 mg of calcium carbonate. It is designed to provide fast relief from common digestive discomforts such as upset stomach, heartburn, and acid indigestion. This product is gluten-free and offers a choice of natural and artificial flavors, making it a convenient option for those seeking quick relief from these symptoms.

By neutralizing stomach acid, LDR Extra Strength Calcium Carbonate helps alleviate the discomfort associated with heartburn and sour stomach, allowing you to feel more comfortable after meals.

Uses

If you're experiencing discomfort from heartburn, sour stomach, or acid indigestion, this medication can help relieve those symptoms. It’s also effective for soothing an upset stomach that may be associated 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) or nonteratogenic effects reported.

Dosage and Administration

When you need relief from certain symptoms, adults and children aged 12 and older can chew 2 to 4 tablets as needed. It's important to chew the tablets thoroughly and not swallow them whole. This allows the medication to work effectively.

However, if your symptoms last longer than 2 weeks, you should consult a doctor before continuing to take the medication. It's always best to follow your healthcare provider's advice to ensure your safety and well-being.

What to Avoid

It's important to use this medication responsibly to ensure your safety. You should not take more than 10 tablets within a 24-hour period. If you are pregnant, limit your intake to no more than 6 tablets in 24 hours. Additionally, avoid using the maximum dosage for more than 2 weeks unless your doctor has advised and is supervising you.

By following these guidelines, you can help prevent potential risks associated with misuse or overuse of the medication. Always consult with your healthcare provider if you have any questions or concerns about your treatment.

Side Effects

It's important to be aware of potential side effects when using this product. You should consult with a doctor or pharmacist if you are currently taking any prescription medications, as antacids can interact with them. While using this product, do not exceed 10 tablets in a 24-hour period, and if you are pregnant, limit your intake to no more than 6 tablets in the same timeframe. Additionally, avoid using the maximum dosage for more than 2 weeks unless directed by a healthcare professional.

Always keep this product out of reach of children to ensure their safety.

Warnings and Precautions

Before using this medication, it's important to consult with your doctor or pharmacist, especially if you are currently taking any prescription drugs, as antacids can interact with them. Be mindful of your dosage: do not exceed 10 tablets in a 24-hour period, and if you are pregnant, limit your intake to no more than 6 tablets in the same timeframe. Additionally, avoid using the maximum dosage for more than 2 weeks unless directed by your doctor.

While there are no specific laboratory tests required for this medication, always stay alert to how your body responds. If you experience any unusual symptoms or have concerns, it's best to stop taking the medication and reach out to your doctor for guidance.

Overdose

It appears that there is no specific information available regarding overdosage for this medication. However, it's always important to be aware of the signs of an overdose, which can include symptoms like extreme drowsiness, confusion, or difficulty breathing. If you suspect that you or someone else may have taken too much of a medication, it’s crucial to seek immediate medical help.

In case of an overdose, contact your local emergency services or go to the nearest hospital. Having the medication packaging or information on hand can help medical professionals provide the best care. Always remember to use medications as directed by your healthcare provider to minimize the risk of an overdose.

Pregnancy Use

If you are pregnant, it’s important to be cautious with medication. You should not take more than 6 tablets in a 24-hour period. Additionally, avoid using the maximum dosage for more than 2 weeks unless your doctor has advised and is supervising you. Always consult with your healthcare provider before taking any medication during pregnancy to ensure the safety of you and your baby.

Lactation Use

If you are breastfeeding, you can feel reassured that there are no specific warnings or recommendations regarding the use of this product while nursing. Additionally, there is no information available about whether this product is excreted in breast milk or any potential risks to your infant.

As always, it's a good idea to consult with your healthcare provider if you have any concerns or questions about using any medication while breastfeeding.

Pediatric Use

When it comes to using this medication for children, it's important to note that it is intended for adults and children aged 12 years and older. If your child is within this age range, they can chew 2 to 4 tablets as needed for their symptoms, or follow the guidance of a doctor.

Always remember to keep the medication out of reach of younger children to ensure their safety. If you have any concerns or questions about its use, don't hesitate to consult with a healthcare professional.

Geriatric Use

When it comes to using this medication in older adults, there is no specific information available about dosage adjustments, safety concerns, or special precautions. This means that if you or a loved one is an older adult considering this medication, it’s important to consult with a healthcare provider. They can help determine the best approach based on individual health needs and any other medications being taken.

Always keep in mind that older adults may have different responses to medications, so discussing any concerns with a doctor is essential for ensuring safety and effectiveness.

Renal Impairment

If you have kidney problems, it's important to know that the information provided does not include specific guidelines for dosage adjustments, special monitoring, or safety considerations related to renal impairment (kidney issues). This means that there are no tailored recommendations for how your treatment may need to change based on your kidney function.

Always consult your healthcare provider for personalized advice and to ensure that your treatment plan is safe and effective for your specific situation. They can help monitor your kidney health and make any necessary adjustments to your medications.

Hepatic Impairment

If you have liver problems, it's important to know that the 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 important to be aware that antacids, which are commonly used to relieve heartburn and indigestion, can interact with some prescription medications. This means that taking them together might affect how well your medications work. Since there are no specific details about other drug interactions or interactions with lab tests, it's crucial to discuss all the medications and supplements you are taking with your healthcare provider.

By having this conversation, you can ensure that your treatment plan is safe and effective, helping to avoid any potential issues that could arise from these interactions. Always keep your healthcare team informed about everything you are taking to get the best care possible.

Storage and Handling

To ensure the best quality and safety of your product, store it at room temperature and always keep the container tightly closed. This helps maintain its effectiveness and prevents contamination.

Before using, check the printed seal under the cap. If it is torn or missing, do not use the product, as this could indicate that it has been compromised. Following these simple guidelines will help you use the product safely and effectively.

Additional Information

You will take this medication orally. There are no additional details available regarding laboratory tests, abuse potential, patient counseling, or postmarketing experiences. If you have any questions or concerns about your treatment, be sure to discuss them with your healthcare provider.

FAQ

What is LDR Extra Strength Calcium Carbonate?

LDR Extra Strength Calcium Carbonate is an antacid that contains 750 mg of calcium carbonate per tablet, providing fast relief from upset stomach, heartburn, and acid indigestion.

How should I take LDR Extra Strength Calcium Carbonate?

Adults and children 12 years and older should chew 2-4 tablets as symptoms occur, or as directed by a doctor. Do not swallow the tablets whole.

What are the dosage limits for this medication?

Do not take more than 10 tablets in 24 hours. If you are pregnant, do not take more than 6 tablets in 24 hours, and do not use the maximum dosage for more than 2 weeks without a doctor's advice.

Are there any contraindications for using this product?

No specific contraindications are mentioned for LDR Extra Strength Calcium Carbonate.

Can I use this product if I am taking other medications?

You should ask a doctor or pharmacist before use if you are currently taking a prescription drug, as antacids may interact with certain medications.

Is this product safe to use during pregnancy?

While there are no teratogenic effects mentioned, pregnant individuals should not take more than 6 tablets in 24 hours.

What should I do if symptoms persist?

Do not use LDR Extra Strength Calcium Carbonate for symptoms that persist for more than 2 weeks unless advised by a doctor.

How should I store this medication?

Store LDR Extra Strength Calcium Carbonate at room temperature and keep the container tightly closed. Do not use if the printed seal under the cap is torn or missing.

Is LDR Extra Strength Calcium Carbonate gluten-free?

Yes, LDR Extra Strength Calcium Carbonate is gluten-free.

What flavors does this product come in?

LDR Extra Strength Calcium Carbonate is available in both naturally and artificially flavored options.

Packaging Info

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

Packaging configurations for Cardinalextra Strength.
Details

Drug Information (PDF)

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

View product document (PDF)

Description

Calcium Carbonate is presented in a dosage form of 750 mg.

Uses and Indications

This drug is indicated for the relief of heartburn, sour stomach, and acid indigestion. It is also effective in alleviating upset stomach associated with these symptoms.

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

Dosage and Administration

Adults and children aged 12 years and older are instructed to chew 2 to 4 tablets as symptoms occur, or as directed by a healthcare professional. It is important that the tablets are not swallowed whole.

Patients should refrain from using this medication for symptoms that persist for more than 2 weeks unless advised by a healthcare provider.

Contraindications

There are no specific contraindications identified for this product. However, the following usage instructions should be strictly adhered to:

  • Do not exceed a maximum of 10 tablets within a 24-hour period.

  • Pregnant individuals should not take more than 6 tablets in a 24-hour period.

  • The maximum dosage should not be used for more than 2 weeks unless directed and supervised by a healthcare professional.

Warnings and Precautions

Healthcare professionals should advise patients to consult a doctor or pharmacist prior to use if they are currently taking any prescription medications, as antacids may interact with certain drugs.

It is crucial to adhere to the recommended dosage guidelines. Patients should not exceed 10 tablets within a 24-hour period. For pregnant individuals, the maximum dosage should not exceed 6 tablets in a 24-hour timeframe. Furthermore, the maximum dosage should not be utilized for more than 2 weeks unless directed and monitored by a healthcare provider.

No specific laboratory tests are required for the safe use of this medication; however, ongoing assessment of the patient's overall health and medication regimen is advisable to prevent potential interactions and ensure optimal therapeutic outcomes.

Side Effects

Patients should be aware of the potential adverse reactions associated with the use of this product. It is important to consult a doctor or pharmacist before use, especially if currently taking a prescription drug, as antacids may interact with certain medications.

When using this product, patients are advised not to exceed a dosage of 10 tablets within a 24-hour period. For pregnant individuals, the maximum dosage should not exceed 6 tablets in 24 hours. Additionally, the maximum dosage should not be used for more than 2 weeks unless under the advice and supervision of a healthcare professional.

To ensure safety, this product should be kept out of reach of children.

Drug Interactions

Antacids have the potential to interact with certain prescription medications. It is advisable for healthcare professionals to assess the timing of antacid administration in relation to other medications to minimize the risk of reduced efficacy of the affected drugs.

Currently, there is no specific information available regarding other drug interactions or interactions with laboratory tests. Therefore, monitoring and dosage adjustments should be guided by clinical judgment and individual patient circumstances.

Packaging & NDC

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

Packaging configurations for Cardinalextra Strength.
Details

Pediatric Use

Pediatric patients aged 12 years and older may chew 2-4 tablets as symptoms occur, or as directed by a healthcare professional. It is important to keep this medication out of reach of children to ensure safety.

Geriatric Use

Elderly patients may not have specific information regarding the use of this medication, including dosage adjustments, safety concerns, or special precautions. Therefore, healthcare providers should exercise caution when prescribing this medication to geriatric patients. It is advisable to monitor these patients closely for any potential adverse effects or changes in efficacy, given the lack of targeted data for this population.

Pregnancy

Pregnant patients should not exceed a dosage of 6 tablets within a 24-hour period. Additionally, the maximum dosage should not be used for more than 2 weeks unless under the advice and supervision of a healthcare professional. It is important for healthcare providers to consider these dosage limitations when prescribing this medication to pregnant patients, as prolonged use or exceeding recommended dosages may pose risks to fetal outcomes. Careful monitoring and consultation are advised to ensure the safety of both the patient and the developing fetus.

Lactation

There are no specific warnings or recommendations regarding the use of this product in nursing mothers. Additionally, there is no information available about the potential for excretion in breast milk or any associated risks to breastfed infants.

Renal Impairment

Patients with renal impairment have not been specifically addressed in the available prescribing information. There are no dosage adjustments, special monitoring requirements, or safety considerations outlined for individuals with reduced kidney function. Healthcare professionals should exercise caution and consider the lack of data when prescribing to this patient population.

Hepatic Impairment

Patients with hepatic impairment have not been specifically studied in relation to the use of this medication. Consequently, there are no established dosage adjustments, special monitoring requirements, or precautions outlined for individuals with compromised liver function. It is recommended that healthcare providers exercise caution when prescribing this medication to patients with hepatic impairment, given the lack of data on its safety and efficacy in this population. Regular monitoring of liver function may be prudent in these cases, although specific parameters are not defined in the available information.

Overdosage

In the absence of specific overdosage information, it is essential for healthcare professionals to remain vigilant regarding the potential for overdose with this 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 arise from an overdose. Common symptoms may include, but are not limited to, severe drowsiness, confusion, respiratory distress, or any other unusual clinical manifestations.

Management of an overdose should be tailored to the individual patient and may involve supportive care, symptomatic treatment, and, if applicable, the use of specific antidotes. It is crucial to consult local poison control guidelines and the product's prescribing information for detailed management protocols.

In all instances of suspected overdose, prompt reporting and documentation are recommended to ensure patient safety and facilitate further investigation into the incident.

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

Healthcare providers should advise patients to keep the medication out of reach of children to prevent accidental ingestion. It is important to inform patients not to exceed a dosage of 10 tablets within a 24-hour period. For pregnant patients, they should be cautioned to limit their intake to no more than 6 tablets in a 24-hour period.

Providers should emphasize that the maximum dosage should not be used for more than 2 weeks unless directed and supervised by a healthcare professional. Additionally, patients should be encouraged to consult with their doctor or pharmacist before using this medication if they are currently taking any prescription drugs, as antacids may interact with certain medications.

Storage and Handling

The product is supplied in a container that must be kept tightly closed to maintain its integrity. It should be stored at room temperature, ensuring that it is protected from extreme temperatures.

Healthcare professionals are advised to inspect the product prior to use; it should not be used if the printed seal under the cap is torn or missing, as this may indicate potential tampering or contamination.

Additional Clinical Information

The medication is administered orally. There are no additional details available regarding laboratory tests, abuse information, patient counseling, or postmarketing experience.

Drug Information (PDF)

This file contains official product information for Cardinalextra Strength, 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 Cardinalextra Strength, 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

Last AI update:

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.